Which of these theories states that we are motivated by several needs, but the strongest source is the lowest unsatisfied need?

The answer the needs hierarchy theory or hierarchy of needs theory. This theory is developed by Abraham Maslow. This is a theory containing a five layer model of human needs, frequently portrayed as hierarchical levels within a pyramid. Maslow indicated that people are motivated to attain certain needs and that some needs take superiority over others. Our most basic need is for physical survival like food, water, and shelter and this will be the first thing that motivates our behavior. Once that level is satisfied the next level up is what motivates us, and so on.

is there a answer choice?

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.