[单选题]
If the diameter of a rad:ua4 yjqzdg1- m3y ,vezn1;icar dish is doubled, what happens toeqbe)c/( 5hbkumf8 0g its resolving power assuming that all other factors r m(g5kuhec8fq)eb0 / bemain unchanged? Its resolving power
A. quadruples.
B. doubles.
C. halves.
D. is reduced to one-quarter its original value.