Although the first pulsar, or rapidly spinning collapsed

Question

Although the first pulsar, or rapidly spinning collapsed star, to be sighted was in the summer of 1969 by graduate student Jocelyn Bell, it had not been announced until February, 1968.

a) Although the first pulsar, or rapidly spinning collapsed star, to be sighted was in the summer of 1969 by graduate student Jocelyn Bell, it had not been announced until February, 1968.

b) Although not announced until February, 1968, in the summer of 1967 graduate student Jocelyn Bell observed the first pulsar, or rapidly spinning collapsed star, to be sighted.

c) Although observed by graduate student Jocelyn Bell in the summer of 1967, the discovery of the first sighted pulsar, or rapidly spinning collapsed star, had not been announced before February, 1968.

d) The first pulsar, or rapidly spinning collapsed star, to be sighted was observed in the summer of 1967 by graduate student Jocelyn Bell, but the discovery was not announced until February, 1968.

e) The first sighted pulsar, or rapidly spinning collapsed star, was not announced until February, 1968, while it was observed in the summer of 1967 by graduate student Jocelyn Bell.

Please explain your answer.
Thanks!

icandy · Answer

Tough one. I was left with D & E. Initially picked E, but dwivedy hit a homer on why E is wrong.

tarek99 · Answer

OA is D

Although the first pulsar, or rapidly spinning collapsed

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