Given Perfect Lenses, What Is the Main Reason That a Telescope

Multiple Choice

Given perfect lenses, what is the main reason that a telescope with a large-diameter objective lens can produce a sharper image than one with a small-diameter lens?

A) A larger lens can focus more wavelengths of light than a smaller lens.
B) A larger lens has a longer focal length than a smaller lens.
C) A larger lens can focus more accurately than a smaller lens.
D) A larger lens can gather more light than a smaller lens.
E) There is less diffraction with a larger lens than with a smaller lens.