我是个没有心机的直肠子。 I'm a _______ man without a lot of complicated twists and turns.

中国大学MOOC: Why does This American Life tell stories that are full of plot twists, red herrings and surprise endings?

According to the passage, why do many fishes stay in group ？（） A: It helps improve their safety. B: It allows them to swim faster. C: It helps them fight their predators. D: It allows them to avoid twists and turns.