Marc has opened a 24-Hour fitness center in a fast-growing city. Before purchasing the franchise and starting his new business, Marc looked at the one other fitness center currently operating in that area. In the same general area are video game rooms, fast food restaurants, a sports bar, a golf driving range, a sporting goods store, and a bowling alley. Marc believes that the one fitness center forms his competition.

• Based on your reading of open systems and Substitutes and Complements in the text, do you agree with Marc or disagree? Why?