阅读选择：阅读下面短文,请从短文后所给各题的4个选项(A、B、C、D)中选出1个最佳选项。

     I consider myself very good at using technology such as computers. At least I used to! However, shopping with my wife the other day clearly showed that this was not true.
     My wife and I walked around the store and I picked out a case of beer. As we walked toward the check-out counter, I noticed there were few people standing there.
     The check-out counter was brand new and there was a keyboard in the front that looked like an ATM(自动取款机) machine. When I placed my shopping cart (购物车) near the machine, it detected my presence and spoke to me in the voice of a very nice woman. "Please slide your card on the front glass", it said.
     OK, I thought, I can do this. I am sure I can figure out an automatic(自动的) cashier machine. My wife thought we should find somebody to help us through this new process. "Relax", I said, “I'll have us out of here in a couple of seconds.” Then I took out my card and slid it down the card-slider on the side of the machine. A couple of seconds later the machine asked me to slide my card on the front glass again. I tried again, but failed.
     After a couple of seconds wait, the cashier machine told me I needed help. I was annoyed. By this time a store assistant had noticed that I was having trouble and came over to help. She took the card from my hand and placed it on the glass beside the slider that I had been using. The machine then thanked me even though it knew was not me who had slid the card over the glass. I knew then that I was beaten.