A, the semicolon is changed into a comma, and the semicolon plays the role of separating sentences. Here, "she showed her soft feelings like a Jiangnan woman" and "she showed her broad mind like a warm-blooded man" are juxtaposed. When there are no other punctuation marks in the middle of the sentence, you can use commas. The wrong sentence divides the sentence into "the beauty of the West Lake lies in its exquisite atmosphere, and she is as soft as a woman in the south of the Yangtze River" and "she is as broad-minded as a hot-blooded man", which is obviously not the case.
I'm sure A is wrong. Some questions just give wrong answers. Believe in yourself.