Which of the Following Choices Has the Ions in Order

Which of the following choices has the ions in order of decreasing size?

A) Rb⁺, Br^-, Se^2-
B) Br^-, Se^2-, Rb⁺
C) Br^-, Rb⁺, Se^2-
D) Se^2-, Br^-, Rb⁺
E) Rb⁺, Se^2-, Br^-