Competitive firms earn zero profit in the long run when

For the U.S. economy, on an average:

A) growth resulting from technology is greater than the growth resulting from human capital. B) growth resulting from technology is smaller than the growth resulting from physical capital. C) growth resulting from technology equal to the growth resulting from physical capital. D) growth resulting from technology equal to the growth resulting from human capital.

If excess reserves are too large, a bank is likely to

A. Borrow in the federal funds market. B. Borrow reserves from the discount window. C. Buy government securities. D. All of the choices are correct.