Final answer:
All of the financial parameters mentioned - loan amount, interest rate, and monthly payments - are critical to a mortgage loan as they affect both the monthly costs and the total interest paid over the life of the loan.
Step-by-step explanation:
The critical financial parameter in the scenario where Keiko bought her house with a mortgage through her credit union is d. All of the above.
The loan amount, interest rate, and monthly payments are all fundamental components of a mortgage loan that significantly affect the total cost of the loan over time and the affordability of the loan for the borrower. These parameters determine the monthly payment amount and the overall interest paid over the life of the loan.
In finance, a loan is the transfer of money by one party to another with an agreement to pay it back. The recipient, or borrower, incurs a debt and is usually required to pay interest for the use of the money.
The document evidencing the debt (e.g., a promissory note) will normally specify, among other things, the principal amount of money borrowed, the interest rate the lender is charging, and the date of repayment. A loan entails the reallocation of the subject asset(s) for a period of time, between the lender and the borrower.
Therefore, the correct answer is d. All of the above.