C, pretty sure due to natural selection and theory of evolution
Explanation:
under what circumstance does a negative cell presents An antigen to another negative cell
What was the investigation? But from my best guess I'm assuming it's the second option. This may be incorrect.
The answer would be A. the arrangement of DnA
Answer:
D. Geologic process that we observed today occurred the same way in the past.
Explanation:
<h3>Hope this helped!</h3>