Answer: Risk averse.

The correct answer is **A** because the risk-return trade-off reflects a positive relationship between expected risk and return. In efficient markets and over long periods, higher returns are typically associated with higher risk. Historical data supports that higher risk results in higher mean returns over time, which aligns with the behavior of risk-averse investors. Options **B** and **C** are incorrect as long-term data does not support risk-neutral or risk-seeking behavior for investors in this context.

Author: LeetQuiz Editorial Team