I would think this is because yahoo is an accredited website that posts credible and factual info
Answer: B) Diatonic
Explanation: The major scale is one of the most commonly used musical scales, especially in Western music. It is one of the diatonic scales.
Edit: Armor for Fish? Srsly?
The answer is (a) Mesozoic and it lasted 180 million years.
D. A fictional person
Memoir- personal narrative, about a real story that happened therefore there are no fictional (fake, made up) characters.