Answer:
The maximum interest rate the bank needs to offer on the loan if Martin is at least to break even on this investment is A) 6%
Explanation:
Martin is offered an investment where for $4000 today, he will receive $4240 in one year. The interest rate of the investment = ($4,240-$4,000)/$4,000x100% = 6%
The maximum interest rate the bank needs to offer on the loan if Martin is at least to break even on this investment should equal the interest rate of the investment: 6%