Arocket with a single engine is used to carry a small satellite into space. however, now designers want to use a design with a heavier payload to include astronauts and a bigger satellite. besides using an engine that can carry more fuel, what could they do? a. they could use an engine with a greater specific impulse. b. they could use an engine with greater engine specs. c. they could use an engine with greater rocket stages. d. they could use an engine with a greater trajectory.