Answer: Manage conflict cooperatively
Explanation: Â 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. Â
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.