Tom has a 4-inch refracting telescope, and Steve has a 3-inch reflecting telescope. Whose telescope has a higher resolving power?
A. Steve's, because mirrors are more efficient in showing the objects separately.
B. Tom's, because lenses are more efficient in showing the objects separately.
C. Steve's, because the smaller the diameter, the better the resolution.
D. Tom's, because the larger the diameter, the better the resolution.
Answer: D
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Fill in the blank(s) with correct word