Mia tried to solve an equation step by step.
\qquad\begin{aligned} 0.1t-3&=5 \\ 0.1t&=2&\green{\text{Step } 1} \\ t&=20&\blue{\text{Step } 2} \end{aligned}
0.1t−3
0.1t
t


=5
=2
=20


Step 1
Step 2


Find Mia'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
Mia did not make a mistake.