From the graph, which four regions is the most effective diverse? A) Moutains and Basins
B) North Central Plains
C) Coastal Plains
D) Great Plains​

I think the answer is A

Explanation:

That graph shows many different varieties in the people that are Latino/Latina etc. There are not any types race that are left out for example in the great plains and the north central plains. The Hawaiians are left out since there are no Hawaiians there. And in coastal plains, there is 0.1 people there that are Hawaiian. If A isn't right its probably D

answer; automatic fire suppression system;