To reference an element in an array, you need to know the array name and the index value of the element.

Option A: Array name. This option is partially correct. The array name is required to identify the specific array you want to access.

Option B: Index value of the element. This option is correct. The index value is used to specify the position of the element within the array. It represents the location of the element in the array.

Option C: Element value. This option is incorrect. The element value is the actual value stored in the array at a specific index, but it is not required to reference an element in an array.

Option D: Both A and B. This option is correct. To reference an element in an array, you need both the array name and the index value of the element.

Option E: All of the above. This option is incorrect. Option C (Element value) is not required to reference an element in an array.

Therefore, the answer is D. Both A and B.