The Concept of Being Risk-Averse Means

The concept of being risk-averse means

A) investors don't want to take on any risk.
B) investors would usually prefer investments with high standard deviations and a greater opportunity for gain.
C) that the greater the risk, the lower the expected return must be.
D) that for a given situation, investors would prefer relative certainty to uncertainty, and the greater the risk, the higher the expected return must be.