If you advertise and your rival advertises, you each will earn $4 million in profits. If neither of you advertises, you will each earn $10 million in profits. However, if one of you advertises and the other does not, the firm that advertises will earn $1 million and the non-advertising firm will earn $5 million. If you and your rival plan to be in business for only one year, the Nash equilibrium is: _______.
a. for your firm to advertise and the other not to advertise.
b. for neither firm to advertise.
c. for each firm to advertise.
d. None of the answers is correct.