million.

a$.$ If she thinks she can earn $7\%$ percent annually, which should she choose?

$-$Select$-$

b$.$ If she expects to earn $8\%$ annually, which is the best choice?

$-$Select$-$

c$.$ If she expects to earn $9\%$ annually, which option would you recommend?

$-$Select$-$

d$.$ Explain how interest rates influence her choice.