An investor adopts mean-variance expected utility E(U)=E(rP)AVar(rP) as her investment objective, where rP is the future return of the investment portfolio and A reflects the investors risk tolerance. If the investor is more conservative (or less able to tolerate risk) than average investors, then A in the objective function should be ____.

Group of answer choices

a large positive number compared to average investor

a small positive number compared to average investor

zero

a negative number