Which of these four array references can point to an array that is different from the others?
B.
All of the variables except arr2b point to a 4D array.
Don't create a 4D array; it's confusing.
The options show the braces can be before or after the variable in any combination.
Option B is the answer because arr2b points to a 3D array.
It only has three pairs of braces before the variable and none after.
By comparison, arr2a has three pairs of braces before the variable and the fourth pair of braces after.