Correct Answer: B

Rationale: The error in the sentence lies in the misspelling of 'worryed,' which should be corrected to 'worried.' This choice addresses the grammatical mistake in the sentence. Choice A ('families') is incorrect as the sentence refers to a singular 'family.' Choice C ('airport' should be 'airport') is grammatically incorrect. Choice D ('their' should be 'there') is also incorrect; 'there' is used to indicate a place, while 'their' shows possession, neither of which is the error in the original sentence.

Correct Answer: C

Rationale: Option C is the correct answer as it correctly separates the cities and states in the series using commas. The items in a series should be separated by commas, with the final two items being separated by 'and.' Choices A, B, and D have incorrect punctuation or lack necessary commas. In Choice A, semicolons are used incorrectly, and in Choice B, semicolons are placed inappropriately. Choice D lacks necessary commas to separate the cities and states effectively. Therefore, Option C is the only choice that demonstrates the correct way to separate items in a series.

Correct Answer: B

Rationale: The correct answer is B: 'A summary of the argument that clearly reinforces its main points.' In a concluding statement of an argument, it is crucial to provide a concise summary that reinforces the main points presented throughout the argument. Option A is incorrect because introducing new points in the conclusion can confuse the audience and detract from the coherence of the argument. Option C is incorrect as the conclusion should focus on summarizing the main argument rather than delving into other perspectives. Option D is incorrect because while metaphors can be useful in enhancing understanding, they are not essential in the concluding statement of an argument, which should primarily focus on summarizing the key points.

Correct Answer: C

Rationale: The correct structure is 'whom to hold responsible' as 'whom' is the object of the verb 'to hold.' In choice A, 'who' should be 'whom' to indicate the object of the verb. Choice B is incorrect as 'whom' is incorrectly placed before 'was responsible.' Choice D is also incorrect due to the awkward phrasing and the use of 'on' which is unnecessary.

Correct Answer: D

Rationale: The correct answer is D: 'Many.' The prefix poly- comes from the Greek word 'polus,' which means 'many.' Therefore, in the word polygon, poly- indicates a shape with many sides. Choices A, B, and C are incorrect because the prefix poly- does not mean 'few,' 'several,' or 'none,' but rather 'many.'