PREP2关于平行的一点问题

The spectacular disintegration of a comet last year in full view of ground- and space-based telescopes provided new insights into how comets form and may thus force a rethinking of the role of comets in the delivery of organic compounds to the evolving Earth.

(A) The spectacular disintegration of a comet last year in full view of ground- and space-based telescopes provided new insights into how comets form and may thus force

(B) The spectacular disintegration of a comet last year in full view of ground- as well as space-based telescopes, provided new insights into how comets form and thus possibly forcing 

(C) When a comet's spectacular disintegration occurred in full view of ground- and space-based telescopes last year, it provided new insights into how comets form and thus may possibly force

(D) Last year, in full view of ground- and space-based telescopes, a comet's spectacular disintegration provided new insights into how comets form and thus possibly forcing

(E) Last year, in full view of ground- as well as space-based telescopes, the spectacular disintegration of a comet has provided new insights into how comets form and may thus force

答案说A很平行 但是我觉得A里面的provided 和force怎么能平行 不应该是forced吗？谁能解答这个问题

B 错在as well as 和and thus possibly forcing  C错在when 和it ,D错在and thus possibly forcing ,E错在as well as ，其实说A 平行是相对and thus possibly forcing 而言的，and连接的是连续性动作，不能把provided与分词来平行，必须与另一个动作平行，至于forced ,因为前面有may 所以不能加ed,所谓平行是逻辑意义和功能上的平行，不能只要求形式平行。这题我做的时候，是找不到A的问题，但其他四个都有必错的原因，于是选A。

谢谢 MM！