有一个 Python程序如下:x = ['big',' small',' medium' , ' large']x.sort( )print(x)可以得到下列哪个结果?
A. [' large',' medium' ,' small' ,'big' ]
B. ['big',' small',' medium' , ' large']
C. ['big',' large',' medium' , ' small']
D. [' small',' medium' , ' large' , 'big']