48. What is the purpose of Casual Friday when it began in the 1950s as some people say? (A) To comfort angry workers who are tired of wearing formal clothing all days a week. (B) To boost employees’ spirit and pump them up for their work. (C)To encourage workers to relax in the office so that they’d take days off less often. (D) To be a pioneer and example in office fashion for the rest of the country.