Five Years Ago,Tammy Always Took a Big Envelope Full of Coupons

Multiple Choice

Five years ago,Tammy always took a big envelope full of coupons to the grocery store.Now that she has a child in pre-school,she rarely brings coupons.Which of the following is NOT a possible explanation of this change in her behavior?

A) Fewer coupons appear in the newspapers than five years ago.
B) The opportunity cost of clipping coupons has risen above their monetary value.
C) Grocery prices have decreased.
D) The opportunity cost of grocery shopping has decreased.