[单选题]
If the diameter of a radar dis:xr:cmyit)hy,)l09v xjfc. oas 8-au h is doubled, what happens to its ruhku5 auq y+0s.h 9qp,esolving power assuming that all other factors remain unchanged? Its resolvi u5 aqs9uk0+p,y hqhu.ng power
A. quadruples.
B. doubles.
C. halves.
D. is reduced to one-quarter its original value.
