In class I offered one of two trades: (1) you give me $0.25 and I'll give you s0.50, or (2) you give me $1.00 and I'll give you $1.50. What was the main point of this example? a. The many shortcomings of the payback rule b. The payoff of a typical call option c. The Monte Hall dilemma d. The impact of real options on the capital budgeting decision e. The relationship between NPV and IRR