单选题

下列哪个语句段的时间复杂度最低? ( )


A

if n%2==0:

     x=x*2

else:

     x=x+2

B

 n=1

while n<=100:

      x=x+2

C

for i in range(100):

       for j in range(10):

               x=x+2

D

for i in range(100):

     for j in range(i):

           x=x+2

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