GMAT Sentence Correction (SC) | Re: VERB-ED MODIFIERS CANNOT JUMP OVER VERBS

Only seven people this century have been killed by the great white shark, the man-eater of the //movies—less than those //killed by bee stings.
A. movies—less than those
B. movies—fewer than have been
C. movies, which is less than those
D. movies, a number lower than the people
E. movies, fewer than the ones

the above quesions is from gmatprep, so this problem is worth studying carefully
the oa is B.

the matter is "fewer than have been..." modify what?. it modifies the whole