Correct Answer: B

Rationale: The correct punctuation in this case is to use a comma (,) to set off the nonrestrictive clause 'whose death shocked America in April of 2016.' This clause provides additional information about the artist Prince without changing the essential meaning of the sentence. Choice A has a semicolon (;) which is incorrect as it separates two closely related independent clauses. Choice C uses em dashes (-) which are incorrect as they should be used for emphasis or to set off information. Choice D uses a colon (:) which is incorrect as it introduces a list or an explanation, not additional information about the artist Prince. Therefore, the correctly punctuated sentence is: 'The artist Prince, whose death shocked America in April of 2016, was one of the most successful musical artists of the last century.'

Correct Answer: C

Rationale: The apostrophe in 'mountain's' is used incorrectly. The word should be 'mountains' without the apostrophe because it is a plural noun, not possessive. The other choices (A, B, D) have the correct usage of punctuation marks and do not contain errors related to punctuation.

Correct Answer: A

Rationale: The complete subject in a sentence includes all the words that describe the main focus of the sentence. In this case, the complete subject is "Sandra's principal reason for choosing the job" as it encompasses all the relevant details about Sandra and her reason for selecting the job. Choice A is the correct answer because it provides the most comprehensive and specific information, making it the complete subject. Choices B, C, and D are incorrect as they do not include all the necessary elements to form the complete subject and do not convey the full context of the sentence.

Correct Answer: B

Rationale: In sentence B, "Ukrainians" is capitalized because it is referring to a specific group of people, and "Malanka" is also capitalized as it is a holiday name. This follows the rules of capitalization for proper nouns. Choices A, C, and D contain correct capitalization, but they also include additional capitalizations that are unnecessary. For instance, in choice A, "African white-backed vultures" should not be capitalized unless it is part of a proper noun or a title. In choice C, while "Neptune" and "Earth" should be capitalized as they are names of celestial bodies, the word "sun" is not capitalized unless it is used as part of the proper noun "Sun." Choice D correctly capitalizes proper nouns like "Edward Jenner" and "Immunology," but the general terms like "Father" and "vaccine" do not need capitalization unless they are part of a title or a specific name.

Correct Answer: C

Rationale: The best way to revise and combine the underlined portion of the sentences is by using a semicolon to show a stronger connection between the two ideas. Using 'however' after the semicolon helps to contrast the innocuous superstition with the negative outcome that sometimes occurred, providing a smoother flow between the ideas. Choice A is incorrect as it lacks a proper conjunction or punctuation to connect the ideas. Choice B is incorrect as 'but' does not effectively contrast the ideas as 'however' does. Choice D is incorrect as a colon is used to introduce a list or explanation, which is not suitable in this context where a contrast is needed.