Who was the first communist leader of Russia? Marx
Lenin
Stalin
Khrushchev
plz help me plz

In which research method does a researcher change the value of one variable to determine how the change affects another variable? a. experiment b. observational research c. survey d. case study

Explain how the ideas of karl marx came to influence american workers in the late 1800s

Micah is studying child behavior in playgrounds throughout the world. he wants to see how the children react when teachers select the same child to be the first to use each piece of equipment. which approach is micah is using?