Barter means exchange since there was no currency back then so the answer would be D.
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.
Evidence of one's claim to authority or competence, such as a diploma, degree, certification, or license is known as the credential.
<h3>What is the evidence?</h3>
Evidence is the term that means to show or to prove that a particular thing is true or is in existence. For better understanding, a few illustrations can be taken. Like They found evidence of a robbery, in the room footprints of three persons present, and many more.
In any courtroom for making the case strong, one has to present evidence that is real like fingerprints, blood samples, DNA, a knife, a gun, and other physical objects.
There are basically two types of evidence, which include Oral and Documentary evidence. Documents that include electronic records are documentary evidence.
Thus, all the names given in the statement are of documentary evidence or credential.
Learn more about evidence from here:
brainly.com/question/6764645
#SPJ1