The marginal rate of technical substitution of labor for capital (MRTSLK) is defined as the rate at which the quantity of ______. A. capital can be increased for every one unit increase in the...

The marginal rate of technical substitution of labor for capital (MRTSLK) is defined as the
rate at which the quantity of ______.
A. capital can be increased for every one unit increase in the quantity of labor
B. capital can be increased if the quantity of labor remains the same
C. labor can be reduced as capital costs increase
D. capital can be reduced for every one unit increase in the quantity of labor