Which statement is true of arrays? A) Array elements cannot be reset after the array is declared. B) Only whole numbers can be stored in arrays. C) Arrays cause more work for the programmer, but allow faster program execution. D) Only whole numbers can be used as array subscripts.

Answer: Option (D) is correct

Explanation:

Array subscripts are used for refereeing to a individual element in the array. It is created by subscript operator for naming it. It can define the value about location often element. Array subscript can contain whole numbers only.

Other options are incorrect because array can be reset, other number along with the whole numbers can get stored in array and it can take high execution time. Thus, the correct option is option (D.)