Suppose you pay only the interest on a loan. Will the loan ever be paid off? Why or why not? Choose the correct answer below. A. Yes. If only the interest is paid, the principal will decrease over time. B. Yes. All payments are split evenly between interest and principal. C. No. Interest increases consistently throughout the term of the loan. D. No. If only the interest is paid, the principal never decreases.

Step 1 ：The question is asking about the effect of paying only the interest on a loan, and whether this will result in the loan being paid off.

Step 2 ：When you take a loan, it consists of two parts: the principal, which is the original amount borrowed, and the interest, which is the cost of borrowing that money.

Step 3 ：If you only pay the interest on a loan, you are only covering the cost of borrowing the money, not the money itself.

Step 4 ：Therefore, the principal, or the original amount you borrowed, will not decrease.

Step 5 ：This means that the loan will not be paid off, because the original amount borrowed is not being reduced.

Step 6 ：Final Answer: \boxed{\text{D. No. If only the interest is paid, the principal never decreases.}}