Answer: closed shop
Explanation:
From the question, we are informed that in the late 1930s management at Atalanta Industries agreed to hire only those workers who were already members of the Electrical Union.
It should be noted that here, Atlanta agreed to a type of arrangement known as closed shop. This occurs when the workers have to belong to a particular union before they'll be employed. This was legal in 1930 but it was later declared illegal by Taft Hartley Act.
