SAT Grammar Question

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1

Granted “retro” has been popular for a long time, as people have sported the clothes and “furnished” their homes with the knick knacks of yesteryear.

Question “furnished”
A) No Change
b) have furnished

The answer is A but can’t b work also due to parallelism?

2

Usually the answer choice is the one that is correct and has the least amount of words (so that it doesn’t become “too wordy”).