Consider the Following Particulate-Level Representation of a Chemical Equation

Consider the following particulate-level representation of a chemical equation: Assume that all spheres represent atoms of A.Which of the following is a correctly balanced equation for this reaction?

A) A → 2 A
B) A₂ → 2 A
C) 2 A → 2 A
D) A → 1/2 A + 1/2 A
E) A(s) → A(g)