Jackie is bowling at a friend's birthday party. She remembers from the last time she bowled

that she needs to walk up to the line, look at the center pin, wind the ball low and behind, and
then move it forward and release her grip.

Shereviews these steps to herself in her mind.
Which stage of cognitive development is she proving she is in?
a. Ingrowth stage
b. Private speech stage
c. Primitive stage
d. Naïve psychology stage

b. Private speech stage