A、Because he wants to protect fish from dying out, B、Because he believes fish are smart. C、Because he believes fish are not safe

[23] New findings suggest that fish might be too smart to be eaten. Dr. Sylvia Earle wants you to stop eating fish. It’s not because fish are endangered, though wild fish stocks in many oceans are very low. It’s not because they’re bad for you, though fish in many areas are exposed to poisonous substances in the water. [23] It’s because they’re smart. “Fish are sensitive, they have personalities,” says the marine biologist. For Earle, eating a fish would be like eating a dog or a cat. “I would never eat anyone I know personally.” There’s a lot more to fish than meets the eye: they talk to each other, they like to be touched, and they engage in behavior that can seem very human. A growing number of animal rights activists point out that fish feel pain and fish suffer horribly on their way from the sea to the supermarket. “While it may seem obvious that fish are able to feel pain, like every other animal, [24] some people think of fish as swimming vegetables,” says Dr. Lynne Sneddon. “Really, it’s kind of a moral question. Is the enjoyment you get from fishing or eating fish more important than the pain of the fish?” [24] Fishermen and fried fish lovers think differently. “I’ve never seen a smart fish,” says Marie Swaringen as she finishes off a plate of fish at a Seattle seafood restaurant. “If they were very smart, they wouldn’t get caught.” “For years, everyone’s been telling us to eat fish because it’s so good for us,” says another diner. “Now I’ve got to feel guilty while I’m eating my fish? What are they going to think of next? [25] Don’t eat salad because cucumbers have feelings?”
Questions 23 to 25 are based on the passage you have just heard.
23. Why does Dr. Earle object to eating fish?
24. Who tends to think of fish as swimming vegetables?
25. Why does the diner mention cucumbers?