[单选题]
As a rock sinks deeper ang- qyg- sv)wr vg-e5-p;pgm218yc yuw d deeper into water of constant density, what happei; y/6mppjyswn9 (,dp ns to the b ;/6jm (yyswp p9np,diuoyant force on it?
A. It increases.
B. It remains constant.
C. It decreases.
D. It may increase or decrease, depending on the shape of the rock.
