The Diffraction-Limited Angular Resolution of One Telescope Is 0

The diffraction-limited angular resolution of one telescope is 0.1 arcsec and that of another is 0.2 arcsec. What does this mean?

A) The telescope with 0.1 arcsec has better resolution.
B) The telescope with 0.2 arcsec has better resolution.
C) It really doesn't mean anything, because telescopes are never limited by diffraction.
D) It is relatively unimportant, because angular resolution is only one of many forms of resolution that must be taken into account.

Correct Answer:

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