Isabella used the following steps to solve an equation.

1. 3(3x + 4) = 9
2. 3x + 4 = 3
3. x + 4 = 1
4. x = −3

Between which steps did she make a mistake?

Select one:
A. Between steps 1 to 2
B. Between steps 2 to 3
C. Between steps 3 to 4
D. No mistake