Which term describes a combined activity where the overall effect exceeds the sum of their individual effects?

• A. Antagonistic
• B. Additive
• C. Synergistic
• D. Complementary

Answer: (C)

The concept being tested is how two factors interact to produce a greater effect than simply adding their separate effects, known as a synergistic interaction. When combined, the overall outcome exceeds the sum of what each would achieve alone because the agents amplify each other’s actions or interfere with opposing processes in a way that boosts effectiveness. This is different from an additive effect, where the total just equals the sum of individual effects, and from antagonistic interactions, where one factor weakens the other so the total is reduced. Complementary actions work together toward a common goal, but don’t necessarily exceed the combined sum on their own.