Sentence Correction

Of the top-grossing films of the 1980s, only a few, having a compliance with MPAA standards, could be seen by children without parental guidance.
A)Of the top-grossing films of the 1980s, only a few, having a compliance with MPAA standards,
B)Of the top-grossing films of the 1980s, only a few, which complied with MPAA standards,
C)Only a few of the top-grossing films of the 1980s, complying with MPAA standards
D)Only a few of the top-grossing films of the 1980s, in which the MPAA standards were complied with,
E)Only a few of the top-grossing films of the 1980s complied with MPAA standards,

OA-b
Need to know
Why is C wrong
B has a non essential modifier which--- so how can the few ( films) be distinguished only by using a non essential modifier

C) Only a few of the top-grossing films of the 1980s, complying with MPAA standards
comma is missing after "complying with MPAA standards"
without comma, the sentence will read "complying with MPAA standards could be seen" nonsensical

,Modifier, → Correct
Modifier, → Wrong
,Modifier → Wrong
Modifier → Correct