question_answer

Consider the following statements about a rocket engine:

1. It is a very simple in construction and operation.

2. It can attain very high vehicle velocity.

3. It can operate for very long duration.

Of these statements:

A) 1 and 3 are correct         

B) 1 and 2 are correct

C) 2 and 3 are correct         

D) 1, 2 and 3 are correct