I think the answer is C or B.
Answer:
Absolute dating is based on calculations of the age of rock strata based on half lives of minerals, relative dating is based on the assumed age of fossils found in the strata and the laws of super imposition.
Explanation:
D. Viral disease
Because it’s a virus that spreads around to other people and need a vaccine to combat it
Sand/quartz or silicon dioxide contains both silicone and oxygen
hope that helps