Which of the following couldn’t be answered with a controlled marketing experiment?

1. Is mobile search really performing as badly as it seems at driving offline sales?
2. What are the most important reasons that people recommend our products?
3. How impactful is our mobile strategy in all of our regional markets?
4. How do we determine the true causal impact from our mobile ads?

100% Correct Answer:

• What are the most important reasons that people recommend our products?