Answer:
C, It took Earth this long to cool enough to form rocks.
Answer:
1. By changing a gene's instructions for making a protein, a mutation can cause the protein to malfunction or to be missing entirely. When a mutation alters a protein that plays a critical role in the body, it can disrupt normal development or cause a medical condition.
Explanation:
Answer: D.
Explanation: Please give me Brainlest Please