Sentence Correction

342. If industrial pollution continues to deplete the ozone layer, the resulting increase in ultraviolet radiation will endanger human health, causing a rise in the incidence of skin cancer and eye disease, and perhaps even threatening global ecological systems.
(A) and perhaps even threatening
(B) and may even threaten
(C) and even a possible threat to
(D) as well as possibly threatening
(E) as well as a possible threat to

IMO B

Parallelism:-

" will endanger human health" "and may even threaten"

endanger is a verb , so we have to use a verb in the second clause to make it parallel...so threaten,,,

whats the OA?

i also think its 'B'.

OA B