Now more and more women go shopping with an incomplete shopping

Now more and more women go shopping with an incomplete shopping list or without list at all. It is mainly because ___
A、it is troublesome to make a complete shopping list
B、there are too many kinds of merchandise for them to choose from
C、merchandise is usually displayed on open shelves, which will remind them of the items they want to buy
D、without a shopping list, they are free to buy whatever they want to buy
【正确答案】：C