The interest rate on an adjustable-rate mortgage (ARM) is modified at regular intervals to match the current market rate. So, option (B): " Adjustable-rate mortgage" is the correct answer.
A home loan with a variable rate of interest is known as an adjustable-rate mortgage (ARM). The initial interest rate on an ARM is fixed for a set length of time.
This means that your monthly payments may increase or decrease. The initial interest rate is typically cheaper than a comparable fixed-rate mortgage.
Interest rates are typically adjusted every six (6) to twelve (12) months by most lenders.
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