It was a horror anthology book. Probably YA?
Okay, so I remember this one anthology horror book. I can't remember what it's called. But the first story (I THINK) followed this plot.
These two kids are going somewhere with their parents who look sad. They wake up after staying in a motel and their parents are gone. They go looking for them. The ending is basically "They failed the test and cant survive in the world." I dont remember if it was meant to be "It's a resource shortage and only the smart survive" kinda thing. But I've been looking for it for years. Does anyone know what it's called? I remember they open an area with a dog or something (I dont remember) and the guy is all "They failed." and the parents are there.