Texas Transport has five possible investment projects for the coming year. Each project is indivisible. They are:
Project Investment (million) IRR
A $ 6 18%
B $10 15%
C $ 9 20%
D $ 4 12%
E $ 3 24%
The firm's weighted marginal cost of capital schedule is 12 percent for up to $6 million of investment; 16 percent for between $6 million and $18 million of investment; and above $18 million the weighted cost of capital is 18 percent. If Texas Transport is only using IRR to choose their projects, they will decide that their optimal capital budget is
A) $12 million.
B) $18 million.
C) $23 million.
D) $28 million.