Which combination of events could have caused the equilibrium interest rate to fall and the equilibrium quantity of loanable funds (both borrowed and lent) to rise
a. A baby boom begins, investor confidence rises.

b. People have lower time preferences, and the governments run larger deficits.

c. A baby boom begins, and investor confidence falls.

d. A baby boom begins, and people have higher time preferences.

e.People have lower time preferences, and capital is more productive.