Which phrase defines complementary goods? a. goods used in combination with other products b. goods given free of cost with the purchase of other items c. goods distributed as product samples among customers d. goods sold at a discounted price during sale season

Which examples are relevant sources for students to use in research? check all that apply. a journal entry written by a professor who is considered an expert a report written by an independent government source a presentation by a company that includes paid information a document published by a renowned organization a scientific paper put out by a non-profit organization a blog whose author tries to sell a product or service