Answer: d. No, because EVPI is $25, which is less than the consultant's fee of $30
Explanation:
The expected value with the consultant's input is $200 and the expected value without it is $175.
The difference of $25 is the maximum that the consultant should be paid because anything larger than this would result in an opportunity loss because if the consultant is paid $30, the net return earned will be $170 which is $5 lower than what would have been earned without her input.
The $30 is simply not worth it.
