Once positioned in space, the Hubble Space Telescope will capture light from sources twenty times fainter compared to those that can be detected
by ground-based instruments.
(A) compared to those that can b detected
(B) compared to those they can detect
(C) than that can be detected
(D) than those that can be detected
(E) than those detecting
My confusion arises from when to use "compared to" vs "than"..
I am pretty sure neither Pricenton nor Kaplan
mentioned anything about this topic.