What is unique about the experimental design of an observational study?
a. data is collected and analyzed for patterns
b. experimental subjects are left free of manipulation
c. knowledge about a living thing is generated
d. evidence is used to test a hypothesis

in this scenario it would be the consumer demand as most influential in making the decision. the band members need to figure out where and from whom they will make the most money, in other words who out of the two consumer groups - football fans or car drivers - will spend their money, who is more likely to contribute to their cause and buy what they are offering.