Answer:The paintings provided evidence that humans had become more complex. ... What was one of the most important signs that early humans were developing a complex culture? The existence of cave paintings.
Explanation: wait..... WHAT THE?!?! HPWHYD UPYOU CHANGE THE QUESTION?
I believe the answer is A
Answer:
Confounding variable
Explanation:
Confounding variable refers to the type of variable that can disrupt the validity of the experiment by giving a certain effect to the variable.
The experiment above was designed to measure mood elevation among the subjects, but the living situation among the subjects are really different among one another and cannot be controlled by the researchers.
C might be the right answer im not 100% positive<span />
