Answer: "Philadelphia and New York City were the most populated cities in 1860 and would soon reach one million residents."
Explanation: This sentence stands out as it is a detail that is a bit more loosely related and can be removed without affecting the overall flow of the passage. This is an unnecessary detail and sounds odd as the author already mentioned that cities were growing quickly, so it is not necessary and the rest of the passage still sounds good without this part and still is interesting.
Answer:
A. Summarising takes longer to do than paraphrasing
Explanation:
Because in summary you'll have to search to the most important points. So it'll take longer to finish summarising than paraphrasing
Answer:2,3 and 4
Explanation: The wording in the first sentence just makes the punctuation wrong
Answer: B
Please see attached for a helpful one-sheeter of terminology (it's based on Julius Cesar, but it applies to the context of the question).