[单选题]
Suppose a ball is thrown straight up. What is its a2lejulxy8s5d9 93 vqcd a *, cec+hhz4cceleration just e0d8 *g)ib+tlr)x ku obefore it reaches its highest poo0ui*)et8+ x kbdlg r)int?
A. zero
B. slightly less than g
C. exactly g
D. slightly greater than g
