[单选题]
A stone is thrown str y8cm4 d:3budp b98yvfaight up. /cg 2k.;boyri /,xz0 w0pnjon At the top of its path, the net force acting on it iswn o/k i;n,ob.0/jc0rz2xyg p
A. greater than its weight.
B. greater than zero, but less than its weight.
C. instantaneously equal to zero.
D. equal to its weight.
