What is the control group, independent variable, and the dependent variable in an experiment?

i have no idea what those things are.. here is an example of an experiment:

Smithers thinks that a special juice will increase the productivity of workers. He creates two groups of 50 workers each and assigns each group the same task (in this case they're stapling). Group A is given the special juice to drink while they work. Group B is not given the special juice. After an hour, Smithers counts how many stacks of papers each group has made. Group A made 1,587 stacks, Group B made 2,113 stacks.

what is the control group?

independent variable?

and the dependent variable?What is the control group, independent variable, and the dependent variable in an experiment?
Control group - Group B.

Independent variable - n/a

Dependent variable - how many stacks of paper