What Is a Characteristic of a Rotary Engine

Multiple Choice

What is a characteristic of a rotary engine?

A) Turns in two directions with the stop-and-start motion of a piston
B) Has the same problem with harmful emissions as piston engines
C) Produces less horsepower with more wasted energy than a conventional reciprocating engine
D) Is more efficient producing more torque than a piston engine of the same displacement