Problem

Peyton tried to evaluate an expression step by step.
 ab cd=ab÷cdStep 1=bacdStep 2=bcadStep 3\qquad\begin{aligned} &\Large\dfrac{ ~\frac{a}{b}~ }{ \frac{-c}{d}} \\\\ \\ =&\dfrac{a}{b}\div \dfrac{-c}{d}&\green{\text{Step } 1}\\\\ \\ =&\dfrac{b}{a}\cdot \dfrac{-c}{d}&\blue{\text{Step } 2}\\\\ \\ =&\:\:\:-\dfrac{bc}{ad}&\purple{\text{Step } 3} \\\\ \end{aligned}
Find Peyton's mistake.
Please choose from one of the following options.