Answer:
pointsssssssssssssssssssssssss
1. Moist air
2. The less dense air, the less oxygen (at least that's what my teacher says)
Carbon-14, also known as radiocarbon, is radioactive.
I think this is an theory changing because a new scientific method was developed. They used what Mendel had learned to test the hypothesis themselves and discovered that he was right.
The correct answer is C. I hope this helps.
