Beth and carl have been married for several years. carl has a habit of picking his nose. initially, beth tried to get him to change by giving him handkerchiefs and tissues. it didn't work. now she simply asks that he not do it in public, which he seems to accept. which strategy for escalating and maintaining relationships is beth employing

Manage conflict cooperatively

Explanation:  Managing the disputes and issues cooperatively describes about settling any conflict with the help of cooperation of everyone involved in it to gain common goal or result .

According to the situation mentioned in question,Beth is using the strategy to settle the issue cooperatively. As Carl is not leaving his nose-picking habit, she ask for settling this matter by asking Beth to not to do it in public so that it does not become embarrassing for both on which Beth agrees.  

In this way the issue is settled as Carl and Beth will be satisfied with the result of the issue and will not have any further conflict or argument.

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.