C) The reign of David I am not positive
I am confused about the question that you are asking but if you mean choosing between the choices that you have listed then i believe the answer is 3
Answer:
The ozone layer shields Earth from the sun's ultraviolet rays, which increase the risk of cancer and threaten crops and aquatic life.
Explanation:
Human-produced chemicals called chlorofluorocarbons (CFCs) made headlines in the 1980s when it became clear they were eating a hole in the ozone layer above Earth's polar regions.
Answer:
Since the Louisiana Purchase directly violated Jefferson´s own political principles of the Democratic-Republicans for which took a strict view of the constiution, Jefferson had to retreat his own principles to make this point.