Jamie tried to solve an equation step by step. \qquad\begin{aligned} \dfrac25n+7&=12 \\ \dfrac25n&=5&\green{\text{S tep } 1} \\ n&=2&\blue{\text{Step } 2} \end{aligned} 5 2 n+7 5 2 n n =12 =5 =2 Step 1 Step 2 Find Jamie's mistake. Choose 1 Choose 1 (Choice A) A \green{\text{Step }1}Step 1start color #28ae7b, start text, S, t, e, p, space, end text, 1, end color #28ae7b (Choice B) B \blue{\text{Step }2}Step 2start color #6495ed, start text, S, t, e, p, space, end text, 2, end color #6495ed (Choice C) C Jamie did not make a mistake.