Keisha tried to evaluate an expression step by step. \qquad\begin{aligned} &3 + (-4) - 7 \\ =&3+(-4)+(-7)&\green{\text{ Step } 1} \\ =&3+(-11)&\blue{\text{Step } 2} \\ =&-8&\purple{\text{Step } 3} \end{aligned} = = = ​ 3+(−4)−7 3+(−4)+(−7) 3+(−11) −8 ​ Step 1 Step 2 Step 3 ​ Find Keisha'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 \purple{\text{Step }3}Step 3start color #9d38bd, start text, S, t, e, p, space, end text, 3, end color #9d38bd (Choice D) D Keisha did not make a mistake.