If the Generic Production Function Q=f(K,L) Displays Increasing Returns to Scale

Multiple Choice

If the generic production function Q=f(K,L) displays increasing returns to scale, the value of K is fixed in the short-run, and the prices of all inputs are held constant, then:

A) the Short-Run Average Cost curve must be strictly decreasing.
B) the Long-Run Average Cost curve must be strictly decreasing .
C) the Short-Run and the Long-Run Average Cost curves will coincide.
D) the Long-Run Average Cost curve must be strictly increasing .