Correct Answer: A

Rationale: The correct sentence is 'Because she was uncertain of her abilities, Renee asked for help.' This sentence uses a comma after the introductory phrase 'Because she was uncertain of her abilities' to set it off from the main clause 'Renee asked for help.' The comma helps to separate the two parts of the sentence clearly and indicates the pause that should be there when reading it aloud. Options B, C, and D are incorrect because they either use a semicolon incorrectly or have commas placed incorrectly within the sentence.

Correct Answer: B

Rationale: The verb 'raised' should be used in the past tense to match the past event (lecture was over). Therefore, the correct phrase is 'raised their hands to ask questions.' In English, when referring to a past event, the past tense of the verb is typically used to maintain proper grammar and clarity. Choice A is incorrect because it uses the present tense 'raise' instead of the past tense. Choice C is incorrect as it uses the present perfect tense 'have raised,' which is not suitable for a simple past event. Choice D is incorrect as it uses the present continuous tense 'are raising,' which is not appropriate for a completed past action.

Correct Answer: C

Rationale: The correct punctuation needed in the sentence is a question mark. The sentence is a question, asking whether the lab results have been read in order to schedule an appointment. Therefore, a question mark is needed at the end of the sentence to indicate that it is an inquiry. The period is used for statements, not questions. A comma would not be appropriate here as the sentence is not a list or a compound sentence. An exclamation mark would imply excitement or surprise, which is not the tone of the sentence.

Correct Answer: B

Rationale: The word 'whom' should be used instead of 'who' in the sentence to make it grammatically correct. 'Who' is used as the subject of a sentence, while 'whom' is used as the object. Therefore, the correct form of the sentence should be: 'For whom was that email intended?' Choices A, C, and D are used correctly in the sentence and do not need any changes.

Correct Answer: A

Rationale: The correct answer is A, 'among'. When choosing from more than two items, the preposition 'among' is used. In this case, 'among' is the appropriate choice as the intern had to select from three specialties, indicating a selection from a group rather than a choice between two specific options. Choice B, 'between', is incorrect because it is used when choosing between two items. Choice C, 'with', and choice D, 'along', are also incorrect as they do not convey the idea of choosing from a group of items.