Acme Company has current assets of $40,000, total assets of $60,000, current liabilities of $20,000, long-term debt of $20,000, and equity of $60,000. What is Acme's capital structure?
a) 50% debt, 50% equity
b) 25% debt, 75% equity
c) 33.3% debt, 66.7% equity
d) 40% debt, 60% equity