The marketing managers at Omaha Steaks used airlines' databases to mail a special offer to frequent flyers. Eight weeks after shipping the steaks to the frequent flyers who placed orders as a result of the initial offer, the company's salespeople followed up by telephoning customers to ask for new orders. This is an example of which two types of non-store retailing? a. direct mail and telemarketing b. direct selling and telemarketing c. telemarketing and online retailing d. online retailing and automatic vending

Leading guitar string producer wound up inc. has enjoyed a competitive advantage based on its proprietary coating that gives its strings a clearer sound and longer lifespan than uncoated strings. one of wound up's competitors, however, has recently developed a similar coating using less expensive ingredients, which allows it to charge a lower price than wound up for similar-quality strings. wound up's competitive advantage is in danger due to a. a lack of perceived value b. a lack of organization c. direct imitation and substitution d. resource immobility