Is time travel in past possible?

according to the uncertainty principle, which of the following statements is true?

a) It is impossible to simultaneously determine both the position and the momentum of a particle with arbitrary accuracy.

b) It is impossible to simultaneously determine both the energy and the momentum of a particle with arbitrary accuracy.

c) It is impossible to measure the position of a particle with arbitrary accuracy in a finite amount of time.

d) It is impossible to simultaneously measure both the energy and position of a particle with arbitrary accuracy.

e) It is impossible to determine a particle's energy with arbitrary accuracy in a finite amount of time.

In August 2011 NASA announced that photographic evidence had been captured of possible liquid water of which planet in our solar system?

Which statement must be true in order for a rocket to travel from earth to another planet?