A published study found a correlation between holidays celebrated and homework assignments. Is causation likely or unlikely? A. Causation is likely. It is reasonable to say teachers assign more homework on holidays.
B. Causation is unlikely. A third variable could be school vacations increase both homework assignments and holidays celebrated.
C. Causation is likely. A third variable could be school vacations increase both homework assignments and holidays celebrated.
D. Causation is unlikely. It is reasonable to say teachers assign more homework on holidays.