感觉Pre的SC句子需结合语意的较多，语法规则难以判断

不知大家时候感觉Pre的SC句子语意理解较OG难？？而且好些题都需要结合语意，仅靠语法规则往往难以判断。大家看看：

14 The largest trade-book publisher in the US has announced the creation of a new digital imprint division, under which it will publish about 20 purely digital works to be sold online as either electronic books or downloadable copies that can be printed upon purchase.

A)  works to be sold online as either electronic books or
B)  works to sell them online, either as electronic books or
C)  works and it will sell them online as either electronic books or as
D)  works, and selling them online as either electronic books or as
E)  works, and it will sell them online as either electronic books or