The conflict of interest between stockholders and management is known as:

Between the two identical bonds having different maturity periods, the price of the ______ bond will change less than that of ______ bond.

A. long-term; short-term
B. short-term; long-term
C. lower-coupon; higher-coupon
D. None of the given options

The longer the time to maturity, all else being equal, increases duration. Higher duration = higher sensitivity to interest rate changes.
Interest rates higher = price lower.