Independent contractors pay higher taxes, are paid less consistently than statutory employees, and, unlike statutory employees, they may freely perform the same type of work for multiple businesses.
(A) taxes, are paid less consistently than statutory employees, and, unlike statutory employees, they may freely
parallelism error. "pay higher taxes" is parallel to "are paid less" but not parallel to "they may". Also, the use of "and" doesn't bring out the contrast evident in the sentence(B) taxes and are paid less consistently than statutory employees; unlike statutory employees, though, independent contractors are free to
bingo! correct. contrast word - "though" brings out the intended contrast. comparison between nouns is concise. (C) taxes and paid less consistently than are statutory employees, but they, unlike statutory employees, are freely allowed to
no verb before paid results in an SV-error. (D) taxes and are paid less consistently than are statutory employees; in addition, unlike statutory employees, independent contractors can freely
The only problem I see in this option is the use of "in addition". The sentence requires a contrast word - independent contractors pay higher taxes, get paid inconsistently, BUT can freely perform same type of work for different businesses. The use of "are" before statutory employees is unnecessary, but it isn't wrong.
IC are paid less than Y - comparison between two nouns.
IC are paid less than are (paid) SE - comparison between actions (but since both are in the same tense, the use of "are" is unnecessary)
(E) taxes and paid less consistently than are statutory employees; moreover, unlike statutory employees, they are allowed to
no verb before paid results in an SV-error.