Which of the Following Statements About Antimatter Is True

Which of the following statements about antimatter is true ?

A) antimatter is only a theory, we have no evidence that it exists
B) antimatter only exists in Earth laboratories; it cannot be made in stars
C) antimatter cannot be made in laboratories; we have tried but it just can't be done
D) when a particle of matter and the corresponding particle of antimatter meet, they become pure energy
E) our telescopes clearly see many nearby antimatter stars in the Milky Way galaxy