If a Company Offers a Consultant the Following Five Alternatives

If a company offers a consultant the following five alternatives, which should she choose?

A) to be paid $50, 000 now
B) to be paid $30, 000 now and $20, 000 when the project in question is completed
C) to be paid $25, 000 now and $25, 000 when the project in question is completed
D) to be paid $10, 000 now and $40, 000 when the project in question is completed
E) to be paid $50, 000 when the project in question is completed