<span>B) Tell his friends he doesn't want to hang out with them anymore because they are being rude</span>
If there were a fire, explosion, or bomb threats in schools, for example, are required to evacuate but if it's a sniper or shooter then they do a lockdown. Because if the shooter is on the outside and they decide to evacuate then they could get shoot so most schools and places do lockdowns.
So the answer would be a sniper. I hope this helps!
<span> the primary cause of dental disease is plaque , C</span>
Answer:
A. Cohort study
Explanation:
It is basically a cohort study because in this we can evaluate the incident rate at a particular time for a particular disease. .
