SAT真题求解答To encourage young people to read, a number of AUTHO

SAT真题求解答
To encourage young people to read, a number of AUTHORS, WHO SELL their books with companion video games that require players to use information from the books to advance in the games.(大写部分为下划线）
A authors, who
B authors, they sell
C authors, having sold
D authors selling
E authors are selling

为什么不选B?

选E
原句A缺了谓语,CD也是却谓语.B错是因为a number of authors 变多余了,用B的话我给你分析一下
To
encourage young people to read（不定式是目的壮语）,a number of authors,they（主语）
sell （谓语）their books（宾语） with companion video games that require
players to use information from the books to advance in the games.那么a number of authors 是什么都不是,多余了.所以直接用E就行