The poetry of George Herbert is regarded by many critics as equal in quality, though less influential, than the work of his more famous contemporary John Donne.
What are being compared?
quality of the poetry of George Hebert and
quality of the work of John Donne. Can I compare the quality of poetry of someone with the quality of the work of another person? Yes, since the emphasis is on quality.
So, option A is basically saying the poetry of George Herbert is
equal in quality
than the quality of the work of John Donne.
to is required rather than
than. I am not sure if the modifier
though less influencial is correct as is or has to be
though less influential than. I believe the comparison marker is
as I'm not sure if
less than is still a requirement or if
less will suffice in this case.
We can eliminate A based on the omission of
to which is required for idiomatic and logical reasons.
Options C, D, and E all
miss to. I wished that option C had
to, I would have chosen it as the best answer out of the lot. This is because option C would have meant
the quality of the poetry of John Herbert is compared with
the quality of the poetry of John Donne. I believe this would be more appropriate than option B. This would be akin to comparing the taste of
varieties of apples rather than
the taste of an apple to
that of an orange. I stand to be corrected; since GMAT has its peculiar requirements.
Option B is the best answer out of the lot. It rightly compares
the quality of the poetry of George Herbert to
the quality of the work of John Donne.