Why would a residential developer buydown a loan?

(A) To create an additional revenue sources when the real estate market is hot and buyer's will therefore bear the additional expense.

(B) To make houses more affordable for buyers without violating any contractual obligations to previous buyers or lower the comparable prices for future sales.

(C) Developers can't buy down loans, only lenders determine loan rates.

(D) To lower the developer's interest payments on their construction loans.