Suppose Bank Marginal currently has $400 million in regular savings deposits. The bank currently pays a 1.50% interest rate on savings. The bank estimates that if it raises the rate on savings deposits to 1.90%, its regular savings deposits would increase by $50 million. What would the marginal cost be for the additional funds raised?

A. 1.50%

B. 1.70%

C. 1.90%

D. 5.10% - correct answer.

E. 6.30%

F. 7.10%