The Four Spheres Below Represent K⁺,Ca²⁺,Cl^-,and S^2-,not Necessarily in That

Multiple Choice

The four spheres below represent K⁺,Ca²⁺,Cl^-,and S^2-,not necessarily in that order.
-Which sphere most likely represents the K⁺ ion?

A) A
B) B
C) A or B
D) C or D