Strontium-90 decays according to the exponential function y = y₀ e^-0.0241t, where t is time in years. Match each question in Column I with the correct procedure in Column II to answer the question.

How long will it take for any amount of Strontium-90 to decay to 75% of its initial amount?

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A. Solve 0.75yo = Yoe-0.0241f. B. Evaluate y = 200e-0.0241(10). C. Solve yo = yoe-0.0241f . D. Evaluate y = 200e-0.0241(20)