Problem: Organized labor proved unable to advance the interests of workers in the 1920s by___. Group of answer choices a. conservative leadership in the AFL neglecting to organize the vast number of unskilled laborers in the mass production industries b. aggressive management weakening the appeal of unions by portraying them as radical organizations after a series of strikes in 1919 c. using injunctions and "yellow-dog contracts"-forbidding employees to join unions- to establish open shops and deny workers the benefits of collective bargaining d. employers wooing their workers away from unions, using techniques of welfare capitalism-spending money to improve plant conditions and winning employee loyalty with pensions, paid vacations, and company cafeterias. e. All of the above.