单项选择题

A.0.50~-12.00,0.25度一跳
B.0.50~-6.00,0.25度一跳,-6.50~-12.00,0.50度一跳
C.0.50~-6.00,0.25度一跳,-6.50~-10.00,0.50度一跳
D.0.50~-10.00,0.25度一跳