The Payoff Matrix Below Shows the Payoffs (In Millions of Dollars)

Multiple Choice

The payoff matrix below shows the payoffs (in millions of dollars) for two firms, A and B, for two different strategies, investing in new capital or not investing in new capital. An industry spy comes to firm B and offers to pay B in exchange for B's certain and enforceable promise to not invest. How much must the spy pay B?

A) $0
B) At least $15 million.
C) At least $35 million.
D) At least $50 million.