TOEFL Reading: ETS-TOEFL阅读机经 - X5XPIFRUMHXM01UDL$

According to paragraph 5, why do some fish swallow their prey whole? A. Their teeth are too large to allow for cutting prey. B. They have no jaw muscles to allow chewing. C. Swallowing prey whole results in a higher net energy gain. D. Chewing can cause their jaws to dislocate.