The relationship between char array and C-style string is [ ]（）

A. If a string is stored in a char array, the size of the char array may be NOT greater than the length of the C-style string

B. If a string is stored in a char array, the size of the char array must be greater than the length of the C-style string

C. The string can be stored only in char array

D. After defining a char array, the size of the array can be changed according to the length of the C-style string