Netflix sells its movie services using its website while Red Box sells its movie services using vending machines. From a customer's point of view, Netflix is using $q,$ and Red Box is using $q,.$

an Internet wholesalers; a retailers.

an Internet wholesaler; a slightly longer channel.

a direct marketing channel; a slightly shorter channel.

a direct$-$marketing channel; an agent.

a direct$-$marketing channel; a type of retailer.