What are the three main factors that determine ad quality?

Q: What are the three main factors that determine ad quality?

A) Expected clickthrough rate, max CPC bid, and landing page experience
B) Expected clickthrough rate, ad formats, and ad relevance
C) Max CPC bid, landing page experience, and ad relevance
D) Expected clickthrough rate, landing page experience, and ad relevance

Correct Answer is D) Expected clickthrough rate, landing page experience, and ad relevance