The . . . . . . . . in a two-dimensional array specifies the elements row and column position.

The correct answer is: B. Subscript

A subscript is a number or letter that appears after a variable name to indicate the position of the variable in memory. In a two-dimensional array, the subscripts are used to specify the row and column position of each element in the array.

For example, in the array arr[2][3], the subscript 2 indicates the row number and the subscript 3 indicates the column number. The element at the intersection of row 2 and column 3 is therefore arr[2][3].

The other options are incorrect because:

• A superscript is a number or letter that appears above a variable name to indicate that the variable is a power of another variable.
• A row number is the number of rows in a two-dimensional array.
• A column number is the number of columns in a two-dimensional array.