We can determine number of elements in two-dimensional array by . . . . . . . .

Multiplying number of rows and number of columns
Adding number of rows and number of columns
Multiplying number of rows and number of rows
Adding number of columns and number of columns

The correct answer is A. Multiplying number of rows and number of columns.

A two-dimensional array is an array that has two indices, one for the row and one for the column. The number of elements in a two-dimensional array is therefore the product of the number of rows and the number of columns.

For example, if a two-dimensional array has 3 rows and 4 columns, then it will have 12 elements. This is because each row has 4 elements, and there are 3 rows.

Option B is incorrect because it adds the number of rows and the number of columns. This will not give the correct number of elements in the array.

Option C is incorrect because it multiplies the number of rows and the number of rows. This will not give the correct number of elements in the array.

Option D is incorrect because it adds the number of columns and the number of columns. This will not give the correct number of elements in the array.

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