问题如下：
The client of Statement 6 is most likely behaving consistently with:
选项：
A. prospect theory.
B. expected utility theory.
C. behavioral portfolio theory.
解释：
C is correct.
The client of Statement 6 is behaving consistently with behavioral portfolio theory. The client sells and holds a stock not because of the stock’s potential, but rather from a fear of the stock declining in value and gains dissipating and an aversion to realizing losses. Loss-aversion in prospect theory is discussed from a different perspective.
