Based on loan and credit analysis, the fundamental problem with the option ARM loan, as most commonly used, was that it created a rapid increase in monthly payments.
This situation is often described as payment shock risk.
In this option ARM loan, the monthly payments increase based on many reasons like unscheduled recast when a negative amortization limit is attained.
Hence, in this case, it is concluded that the correct answer is "monthly payments."
Learn more about ARM loan options here: https://brainly.com/question/17144618
