Which of the following events could decrease the cost of money? check all that apply.
(a) inflation increases
(b) the federal deficit decreases
(c) the federal reserve purchases treasury securities held by banks
(d) the federal reserve sells treasury securities to banks

In my opinion the correct answers are  items  A,D

Explanation

A , Because  if the inflation increases  it means that there are  high price to purchase goods ,that is why  people are afraid  to this high prices and it leads to reduce interest rates and savings.

D, Because  if there are low interest rates the price of  Treasuary securities are  more expensive.