Applying Neoclassical Theory to the Housing Market, an Upward Shift

Applying neoclassical theory to the housing market, an upward shift of the expected marginal product of (housing) capital may be caused by ________.

A) higher expected household income
B) the inability to buy as much housing at a higher price
C) an expected increase in the relative price of housing
D) a decrease in the cost of building new houses