Question

highlight the controls (things that smithers leaves the same)
smithers thinks that a special juice will increase the productivity of workers. he creates two groups of 50 workers and assigns each group the same task (in this case, they’re supposed to staple a set of papers). 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.

Explanation:

To identify the control, we look for the group that does not receive the special juice (the independent variable). Group B is not given the special juice, so it serves as the control since it experiences the same conditions as Group A except for the juice, allowing comparison to assess the juice's effect on productivity.

Answer:

Group B (the group not given the special juice)