Unit of measurement . a punk/disco band , was signed up to play a benefit concert for New Year's Eve. They started at 6:00 pm on New Years eve and managed to play until 9:00 am in the morning of Janurary 2. Interestingly , they are paid by the minute so they need to know how long they played in minutes. Which type of problem best expemplifies this question?. A. Order Of magnitude . B. Unit conversion. C. Significant figures. D. Estimation