A and C are much closer to the limits of their respective physical bodies than B. A - due to his high motivation (he is a maximizer, while B is a satisficer, if A didn't have a motivation to maximize his results, he could do the same (or better) as B), C - due to his limited physical abilities. Therefore, they have lower tolerance for the worse environment. In other words, if we plot physical abilities on x axis and the expected/desired result (i.e.result that they have a motivation to achieve) on y axis, we would probably obtain a convex function whose graph is below the line y=x (which corresponds to pushing the physical limits of the body).