In Drawing a Supply Curve, the Labels for the Axes

In drawing a supply curve, the labels for the axes are

A) price (on the vertical axis) and quantity (on the horizontal axis) .
B) price (on the vertical axis) and quantity per unit of time (on the horizontal axis) .
C) price (on the horizontal axis) and quantity (on the vertical axis) .
D) price (on the horizontal axis) and quantity per unit of time (on the vertical axis) .