Answer:
The answer is: A) diminishing marginal utility of wealth, implying that her utility function gets flatter as wealth increases.
Step-by-step explanation:
If an investor is risk averse, he or she will earn a lower return rate than a non risk averse investor. As his or her wealth increases, the total utility of wealth increases but at a decreasing rate. This means that the utility function gets flatter as wealth increases for a risk averse investor.