The fish of class Osteichthyes, known as "bony fishes," have several features in common, including a bony skeleton, a

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The fish of class Osteichthyes, known as "bony fishes," have several features in common, including a bony skeleton, a combination of lungs and gills, and they have a swimbladder that allows the fish to float at any level in the water.

A. they have a swimbladder that allows

B. having a swimbladder allowing

C. a swimbladder that allows

D. to have a swimbladder that allows

E. have a swimbladder that allows


OA C

Source: Princeton Review