An Isoquant Map,with Labor on the Horizontal Axis and Capital

Multiple Choice

An isoquant map,with labor on the horizontal axis and capital on the vertical axis,has horizontal isoquants.This implies that the:

A) marginal product of capital is zero.
B) marginal rate of substitution of capital for labor approaches infinity.
C) marginal product of labor is zero.
D) marginal rate of substitution of capital for labor is positive.