Andre's daughter is now old enough to walk to school on her own. Andre wants to make sure that she is safe, so he is looking for a tracking tool that will help him keep tabs on where she is$.$ Andre has determined that whatever he purchases must be non$-$intrusive, hidden in plain sight, and waterproof. Andre is at which stage of the consumer decision$-$making process?

a$.$ Purchase

b$.$ Postpurchase behaviour

c$.$ Information search

d$.$ Evaluation of alternatives