Sasha and Brian have spent countless hours analyzing couches on Wayfair and comparing them to what they can find at IKEA. They settle on their budget and decide that Wayfair is the most cost$-$effective option, as IKEA charges extra for delivery of a couch. They choose a nice, purple statement piece and pay using their MasterCard. Sasha and Brian are at which stage of the consumer decision$-$making process?

a$.$ Purchase

b$.$ Postpurchase behaviour

c$.$ Need recognition

d$.$ Evaluation of alternatives