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 thus may 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 thus may force

B. 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 thus possibly forcing

C. When a comet's spectacular disintegration occured in full view of ground- and space-based telescopes last year, it provided new insights into how comets form and thus possibly forcing

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- and space-based telescopes, the spectacular disintegration of a comet has provided new insights into how comets form and may thus force


I was confused btw A and E . finally decided to go with E , a i thought the insights ( has) continue till today . also e seemed to be better organized with commas etc . A was on staraight leanghty sentence .

plz help

What is the OA? i went with E. A seemed to imply that that telescopes were also responsible.

the answer is (A)

Answer choice A puts the events in proper perspective:
* The comet disintegrated last year; this was a one-time event.
* It provided new insights. Since it was a one-time event, it's appropriate to say 'provided' (simple past tense), unless the same event has CONTINUOUSLY provided newer and newer insights, in which case 'has provided new insights' would be better. But there's no indication of the latter in this sentence.
* The 'forcing' is a possible future event.

According to choice E:
* The comet's disintegration produced new insights last year.
And, more absurdly,
* The disintegration produced those insights in full view of ground- and space-based telescopes!