Which of the following statements is correct? a. The greater the mass of rocket fuel burned, and hence the greater the mass of exhaust experiencing a downwards force away from the rocket, the greater the upward thrust experienced by the rocket.   b. The reaction force on the rocket is equal in magnitude, and in the opposite direction to, the action (or thrust) from the engine on the exhaust.   c. For a rocket to launch, the thrust force has to be greater than the gravitational force   d. The acceleration of the rocket is dependent on the thrust but independent of the mass of the rocket

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