The correct answer to this question is alternative D) "A decrease in the price of securities."
Alternative A is wrong given the fact that increasing interest rates are one of the ways by which inflation can be overcome. Decreasing interest rates would help inflation.
Alternatives B and C are somewhat related, since with economic growth, consumer spending usually goes up. The problem with that is that reducing spending is actually the way to fight inflation.
That leaves us with alternative D being the correct one.