Answer:
you cant ask for test answers on brainly. use quizlet or something else if you want !
Explanation:
#30 a point at which parts artificial structure are joined
It's hard for me to explain this but the only difference between the two is that the independent variable in the controlled group stays constant so you can see the difference in results between the experimental and controlled group
what do you want "help??????????????????????" with?
I believe it’s C because you’re trying to prove your point