According to R.E.S.P.A., on applicable loans, a lender is required to furnish a copy of a Special Information Booklet (prescribed by Housing and Urban Development) together with a "Good Faith Estimate" of closing costs to every person from whom it receives (or for whom it prepares) a written application for a federally related loan, within:

a. 3 business days.
b. 12 business days.
c. 15 business days.
d. 21 business days.