Geraldo, a construction worker, tends to buy a new gadget if most of his friends have them and only after they've teased him about not having the gadget yet. He relies on reviews from his friends rather than on television or newspaper advertisements to make his purchase decisions. It can be inferred that when it comes to the diffusion of innovation Geraldo belongs to the group of . a. early adopters b. late majority c. early majority d. innovators