Andre's child is going to be walking to school this year by herself for the first time. Andre hid in the bushes and followed her the first day, just to make sure she was safe, and bumped into another parent doing the same thing. The other parent mused that they should put GPS trackers in their children's knapsacks. Andre had never thought about that before. Andre is at which stage of the consumer decision$-$making process?

a$.$ Postpurchase behaviour

b$.$ Evaluation of alternatives

c$.$ Information search

d$.$ Need recognition