单项选择题

下列4种形式的循环设计中,循环次数最少的是

A.a=5:b=8 Do a=a+1 Loop Wbile a<b
B.a=5:b=8 Do a=a+1 Loop Until a<b
C.a=5:b=8 Do Until a<b b=b+1 Loop
D.a=5:b=8 Do Until a>b a=a+1 Loop