Sentence Correction

Like many other philosophers from the early 20th century who wrote books and articles about divisive political issues, the French philosopher Paul Ricoeur, regarded as one of the great intellectual peacemakers, also wrote controversial political works, and they were as penetrating as those of his colleagues but were less damaging to his reputation.

A and they were as penetrating as those of his colleagues but were
B and these works were as penetrating as his colleagues, but being
C and, as penetrating as his colleagues', but were
D as penetrating as those of his colleagues, however, they were
E as penetrating as his colleagues' however, it was

IMO D...what is OA??

A IMO

Between A and D, D uses 'they' which seems ambiguous. A seems ok as it is.

ya, between A and D
the problem with D is COMMA after 'political works'.... COMMA as....as does not make sense
then +1 for A