Question: If arr is an array containing data values then what does the 2 refer to in the statement below? arr [ 2 ] = 5

If arr is an array containing data values then what does the 2 refer to in the statement below?
arr[2]=50;
Group of answer choices
the data stored in the first element of the array
the number of elements in the array
part of the name of the array
an index value used to identify an element of the array

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