Please help me answer this question. Please show all steps involved, I would really appreciate it. Thanks,

A decision maker's utility curve is U(x) = 10,000 (1 - e-^x/10'000). Option A has a 50/50 chance of producing profits of -$5,000 and $10,000. Option B is the do-nothing alternative. Which is the best choice and what is its value? Option A, -83 Option B, 0 Option A, 2, 212 Option A, 2, 500