Mario tried to solve an equation step by step. \begin{aligned} \dfrac43&=q+\dfrac13 \dfrac43-\dfrac13&=q+\dfrac13-\ dfrac13&\green{\text{Step } 1} \dfrac23&=q&\blue{\text{Ste p } 2} \end{aligned}
3
4


3
4

−
3
1


3
2




=q+
3
1


=q+
3
1

−
3
1


=q


Step 1
Step 2


Find Mario'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
Mario did not make a mistake.