[单选题]
98.15: A freely falling objecn0q,y;h ce fx*t is found to k x3tmaks7+kg fg2cg;j00 z7o be moving downward at 18 m/s. If it continues to fall, two seconds lfgtsa+x700gko 3 g2j7; cm kzkater the object would be moving with a speed of
A. 8.0 m/s
B. 10 m/s
C. 18 m/s
D. 38 m/s
E. 180 m/s