A businesswoman wishes to invest a certain sum of money at the end of every year for five years. The investment will receive 6 percent compounded yearly. At the end of 5 years, she will need a total of $30,000 accumulated. How should she compute the required annual investment?

a) $30,000 times the amount of an annuity of $1 and 6% at the end of each year for 5 years
b) $30,000 divided by the amount of an annuity of $1 at 6% at the end of each year for 5 years.
c) $30,000 times the present value of an annuity of $1 at 6% at the end of each year for 5 years.
d) $30,000 divided by the present value of an annuity of $1 at 6% at the end of each year for 5 years.