David's family comprises his parents and his elder brother Adam. The relationships between David and each of his parents and the relationship between him and his brother are interconnected and form a network. In the context of the social network perspective, the connection between David and his brother is a .

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.

i think it is the third one.