Answer:
Correct sentence: Christopher Columbus, born in Genoa, never did reach mainland North America.
Correct Answer: the phrase "born in genoa" should be set off by commas because it's nonessential information
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The correct answer is actually D), not A.
Although these are independent clauses indeed, the punctuation in A,B, and C is not correct.
Before 'however' there needs to be a semicolon (;). And after however, you have to put a comma. Therefore D is the correct answer.
After a comma there needs to be a pause in reading. Does A sound correct to you if you make a pause before 'however' and not after it? Of course not.
Yet again, verified answer is wrong. The correct choice is the first one : The stories that Thomas tells and his desire to be listened to allow Alexie to show that telling and listening to stories is an important way people shape and understand their lives.
Answer:D:The development and description of the characters within the story.