Answer:
He says the economy is doing well. This means that people are more willing to spend money.
Step-by-step explanation:
According to the section, The Creeping Cost Of Costumes And Candy.", the detail that explains why people plan to buy a lot of stuff for Halloween this year is option A.
This is because the economy is said to be doing well and more people are willing to spend money on Halloween this year, compared to other years.