Answer:
Letter B. Annual interest rate and period.
Step-by-step explanation:
In the simple interest system, interest accruals are accounted for each period to the initial capital. Thus, to determine the amount of interest paid it is necessary to multiply the amount of savings, the interest rate and the period, which can be annual, monthly etc. The formula for the calculation is: J = C x i x t, where C is the capital, ie the savings, i the period interest rate and t the time period.time period.