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In video lectures, we talked about investors' risk preferences based on utility theory. A utility function is a way of measuring one's "happiness" as a function of wealth, often denoted as U(w). Which of the following functions is the most reasonable approximation for a risk-averse investor's utility function in terms of their total wealth in dollars, W? O AW O B. loge(w) OC. w squared D. W cubed O E 1 Insert appropriate prompt, input type, and other instructions here