As Part of Its Promotional Efforts,Blue Ink Projectors Inc

As part of its promotional efforts,Blue Ink Projectors Inc.offered pens and other merchandise to teachers in private schools-their primary target market.However,teachers in most private schools were hesitant to accept the promotional material,as their organizational policy was against accepting gifts from suppliers.As a result,the company's promotional efforts failed.What lesson did the marketers of Blue Ink Projectors learn?

A) Their marketing efforts must avoid conflicts of interest between the customer company and its employees who influence the purchase.
B) The buying centers in private schools are ineffective.
C) Their promotional efforts have been targeted toward the wrong organizational customer.
D) The needs of the customer company and the needs of its employees are complementary to each other.
E) The company should secretly deliver pens to its customers' homes.