Teenagers may not think of illicit drugs to be dangerous, but many of them can be addictive, especially if they are used habitually.

a. Teenagers may not think of illicit drugs to be
b. Teenagers may not think of illicit drugs being
c. A teenager may not think of illicit drugs being
d. A teenager may not think of illicit drugs as
e. Illicit drugs may not be thought of, by teenagers, as

OA = D
Can someone explain why E is incorrect?