单项选择题

While visiting France, we decided to do some shopping. Not far from the hotel was a store with all kinds of clothing hanging up, and a notice offering fifty percent discount.
When we entered the shop, a woman asked if she could help us, but we would like to look a round on our own. She looked at us very strangely.
Not finding anything suitable, we thanked the woman and left. Suddenly my husband began to laugh and pointed to a small sign in English. It said: "DRY-CLEANING SHOP".

The woman in the shop stared at them strangely, because()

A. she saw foreigners for the first time
B. they had on funny clothes
C. she wondered why they came into the shop
D. they didn’t give her any money