Answer:
A. Annuity C
Explanation:
we can use the present value of an ordinary annuity formula to determine the annual contributions:
FV annuity factor, 5%, 5 periods = 5.5256
FV annuity factor, 5%, 10 periods = 12.578
FV annuity factor, 5%, 30 periods = 66.439
annual contribution annuity A = $50,000 / 5.5256 = $9,048.79, total annuity payments = $45,243.95, so accumulated interests are $4,756.05
annual contribution annuity B = $50,000 / 12.578 = $3,975.19, total annuity payments = $39,751.90, so accumulated interests are $10,248.10
annual contribution annuity C = $50,000 / 66.439 = $752.57, total annuity payments = $22,577.10, so accumulated interests are $27,422.90