What is true with respect to an atom?

Which statement is true about atoms?A. When an atom gains an electron, it becomes a cation 
B. When an atom gains an electron, the atomic radius decreases. 
C. When an atom loses an electron, the atomic radius decreases.  (Answer)
D. When an atom loses an electron, it becomes an anion. 

These are probably not your answer choices but that statement is true:
"When an atom loses an electron, the atomic radius decreases"

HOPE THIS HELPS:)