Shakespeare's poetry, which not only includes 154 sonnets but four narrative poems as well, are generally given less attention than they give his plays.
MEANING:
Shakespeare's poetry includes 154 sonnets and four narrative poems. And his poetry receives less attention than his plays.
Error Analysis:
Idiom - Not only but also
A. which
not only includes 154 sonnets
but four narrative poems as well, are generally given less attention than they give his plays - Incorrect
B. which include not only 154 sonnets but also four narrative poems, are generally given less attention than his plays - Correct Idiom
C. which not only include 154 sonnets but also four narrative poems as well, is generally given less attention than it gives his plays Correct Idiom
D. which includes not only 154 sonnets but four narrative poems as well, are generally given less attention than would be his plays - Incorrect Idiom
E. which includes not only 154 sonnets but also four narrative poems, is generally given less attention than his plays Correct Idiom
NEXT,
Poetry is singular so sentence should be "S poetry ,......, is)
B. which include not only 154 sonnets but also four narrative poems,
are generally given less attention than his plays - Are usage incorrect
C. which not only include 154 sonnets but also four narrative poems as well, is generally given less attention than it gives his plays - Incorrect parallelism of not only but also
E. which includes not only 154 sonnets but also four narrative poems, is generally given less attention than his plays Correct Idiom
CORRECT Answer is E
Hope my explanation is correct. Let me know if I can improve it further