How did scientists boost the spacecraft Juno on its way to Jupiter, helping it overcome the gravitational pull of the Sun? A.
by using two rockets
B.
by using a gravitational slingshot
C.
by decreasing the mass of Juno
D.
by increasing the fuel on the rocket

sentence lenght varies according to word choice.you select which word to use and that will require to use other expressions that collocate with the word chosen.sentence length will vary   according to the choice of words you make to express your ideas.  

the anwser is our hope this