One day, Betty felt lethargic, hopelessly sad, fatigued, and had no interest in anything. A few days later she was feeling extremely euphoric and powerful, engaged in risky sexual exploits, and spent money irresponsibly. Betty could be diagnosed with:

Bipolar Disorder  

Explanation:

One day, Betty felt lethargic, hopelessly sad, fatigued, and had no interest in anything. A few days later she was feeling extremely euphoric and powerful, engaged in risky sexual exploits, and spent money irresponsibly. Betty could be diagnosed with bipolar disorder. Bipolar depression is a mental health condition that is characterized by extreme mood swings such as emotional highs (extreme feeling of joy) and emotional lows (feelings of depression). Betty expresses extreme mood swings such as joy and depression which is a symptom of bipolar disorder.

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.