A、Requesting customers to pay before taking the food B、Asking customers to leave their bags on the counters. C、Allowing only two

[23]Imagine that someone in your neighborhood broke the law, and the judge put the whole neighborhood under suspicion. How fair would that be? Well, it happens every day to high-schoolers. Just because some students have stolen things in shops, all of us are treated like thieves. Even though I’d never steal.
    Store employees looked at me like I’m some kind of hardened criminal. For example, during one lunch period, my friend Denny and I went to the Grab and Go Restaurant to have a hotdog. We arrived to find a line of students waiting outside. [24]A new sign in the window told the story. "No more than two students at a time." After 15 minutes, we finally got in. But the store manager laid the evil eye on us. I asked him about the new sign, and he said, "You kids are stealing too much stuff." You kids? Too much stuff? We were not only assumed to be thieves, but brilliant, greedy thieves. The most annoying thing though, is the way employees watched my friends and me.
It’s horrible.
    Once, at a drugstore, I was looking around and found a guy standing on a large box, stocking the shelves. [25]He was watching my hands, more than he was watching his own. I showed him that my hands were empty. He got down off his box and rushed off, as if he was going to get the store manager. How crazy is that!
23. What does the speaker find to be unfair?
24. What measure did the Grab and Go Restaurant take to stop stealing?
25. What happened in a drugstore that greatly annoyed the speaker?