Lucina is given the equation y+8=−14(x+4) and asked to rewrite the equation in slope-intercept form.

Her work is outlined below:

y+8=−14(x+4)

Step A: y+8=−14x+4

Step B: y+8−8=−14x+4−8

Step C: y=−14x−4

At which step, if any, did Lucina make a mistake?