First of all, a is wrong, because the length of this array should be specified during declaration and initialization. In the JAVA language, this two-dimensional array is actually a reference to several one-dimensional array variables, so the length must be specified in the first bracket of the new statement.
B is obviously wrong. When defining a two-dimensional array, the first two brackets indicate the type and cannot have a value.
C is correct
D is incorrect, because two-dimensional arrays are references to several one-dimensional arrays, so there must be two parentheses outside the variable name.
E's mistake, I believe you can see it. You cannot put variable names in parentheses.
Now give you a general formula, so that you can make a good judgment in the future:
Data type array variable name [] [] = new data type [length] [fixed length or indefinite length];
Great, isn't it?