Answer is A; experiments: a scientific procedure undertaken to make a discovery, test a hypothesis, or demonstrate a known fact.
Deliah, Who is using quantifiable data to validate her hypotheses
"East Germany was communist, while West Germany was democratic" is the one among the following choices given in the question that was <span>a key difference between East and West Germany. The correct option among all the options that are given in the question is the fourth option or option "4". I hope it helps you.</span>