7. By the tenth year of an 11 percent 30-year amortization period, how much of the principal...

7. By the tenth year of an 11½ percent 30-year amortization period, how much of the principal balance will have been repaid under a monthly amortization of equal installments? Use Table 11.2 in the text.

A. One-half.

B. One-third.

C. Two-thirds.

D. None of the above.