Which letter is at point (1, 5)?

A first quadrant coordinate plane with four labeled points from A through D. Point A, 2 units to the right, 2 units up. Point B, 4 units to the right, 1 unit up. Point C, 1 unit to the right, 5 units up. Point D, 3 units to the right, 6 units up.

The letter at point (1, 5) is C.