单项选择题

A.75%乙醇30s,10%碘伏60s,75%乙醇60s
B.10%碘伏60s,75%乙醇30s,75%乙醇30s
C.75%乙醇30s,75%乙醇30s,10%碘伏60s
D.异丙醇30s,75%乙醇60s,75%乙醇30s