What state has a county with the highest percentage of Native Americans?

Here is the question :

WHAT STATE HAS A COUNTY WITH THE HIGHEST PERCENTAGE OF NATIVE AMERICANS?

Here is the option for the question :

Oklahoma
South Dakota
New Mexico
Arizona

The Answer:

And, the answer for the the question is :

South Dakota

Explanation:

[STC0012188]. While Los Angeles County has more Native Americans overall, Oglala Lakota County in South Dakota has the greatest percentage of Native Americans (93.9%) of any county in the United States. Native Alaskans make up over 20% of the state’s total population, the largest percentage of any state.