The Yellow dog contracts are now outlawed, however in the early 20th century such agreements among employers: (1) Not to purchase intermediate goods generated by unionized labor hindered labor market re-forms. (2) And workers specifying that the workers would not connect a union were common. (3) Were employed primarily to block the communist takeovers of industrial unions. (4) And unions made featherbedding an extensive practice.
Find out the right answer from the above options.