Carly tried to solve an equation step by step. \begin{aligned} 7a&=28 \dfrac{7a}a&=\dfrac{28}7&\g reen{\text{Step } 1} 7&=4&\blue{\text{Step } 2} \end{aligned} 7a a 7a 7 =28 = 7 28 =4 Step 1 Step 2 Find Carly'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 Carly did not make a mistake.