In a study conducted by J. Lefkowitz (1970. in a lingerie production factory to determine the effects of training on productivity and turnover, the researcher found _______________________________.a. the longer the training received in the training facility, the lower the rate of turnoverb. the longer the training received in the training facility, the higher was the average daily rate of productionc. the level of training was the dependent variabled. the production rate and turnover were the independent variables