Unlike the short flights of the shuttle and earlier spacecraft, which

Correctly pointed out!

The reason B is wrong is that the prepositional phrase " with......." is unclear in terms of the clause/phrase it is modifying. Is it the previous one or the next one.

eg. XXXXXXXXX, with.........., YYYYYYYYYY

We dont know with is referring to XXXXXXXXX or to YYYYYYYY.


Hope this clarifies

Unlike the short flights of the shuttle and earlier spacecraft, which carried sufficient power in fuel cells and batteries, a permanently orbiting space station will have to generate its own electricity.

A. the short flights of the shuttle and earlier spacecraft, which carried sufficient power in fuel cells and batteries
B. the shuttle and earlier spacecraft, with sufficient enough power in fuel cells and batteries for their short flights
C. the short flights of the shuttle and earlier spacecraft, which enabled them to carry sufficient enough power in fuel cells and batteries
D. the shuttle and earlier spacecraft, which were capable of carrying sufficient power in fuel cells and batteries for their short flights
E. the flights of the shuttle and earlier spacecraft, whose shortness allowed them to carry sufficient power in fuel cells and batteries

Unlike X, Y is the correct construction, where X and Y are logical and parallel.

A. space station is compared with flights of shuttles. Apples to oranges
B. sufficient enough is a heavily redundant construction.
C. Same error as A
D. Correct.E. Same error as A and C.

Unlike the short flights of the shuttle and earlier spacecraft, which carried sufficient power in fuel cells and batteries, a permanently orbiting space station will have to generate its own electricity.

A. the short flights of the shuttle and earlier spacecraft, which carried sufficient power in fuel cells and batteries
B. the shuttle and earlier spacecraft, with sufficient enough power in fuel cells and batteries for their short flights
C. the short flights of the shuttle and earlier spacecraft, which enabled them to carry sufficient enough power in fuel cells and batteries
D. the shuttle and earlier spacecraft, which were capable of carrying sufficient power in fuel cells and batteries for their short flights
E. the flights of the shuttle and earlier spacecraft, whose shortness allowed them to carry sufficient power in fuel cells and batteries


If option B was only (...),with sufficient(...) or (...),with enough(...) was correct? Or the "wich" is more correct than "with" ?