d'Anconia Copper is considering issuing one-year debt, and has come up with the following estimates of the value of the interest tax shield and for different levels of debt Debt Level ($ Millions) $0 $25 $50 $60 $70 $80 $90 PV of interest tax shield ($ Millions) $0.0 $0.4 $1.0 $1.2 $1.5 $1.7 $2.0 Probability of financial distress 0% 0% 1% 2% 7% 17% 32% Q. If in the event of distress, the present value of distress costs is equal to $10 million, then the optimal level of debt for d'Anconia Copper is: A. $25 million. OB. $50 million. OC. $60 million. D.$70 million.