What are two of the states with extensive native american reservations?

Arizona and South Dakota.

Arizona is the state with probably more Native American reservations than any other. We could name a couple such as the Navajo Nation, Tohono O’odham Nation, San Carlos Apache Reservation, Hopi Tribe, Colorado River Indian Tribes, among many others. A fun fact is that with such an amazing diversity of Indian culture, Arizona has one-fourth of its territory occupied by more than 20 reservations!

Second to Arizona, South Dakota is also one of the states with an outstanding abundance of Indian American reservations, among which we can find, the Pine Reach Indian reservation, the Flandreau Indian reservation, the Rosebud Indian reservation, and others.

i do believe its (d) it allowed the government to offer pioneers sixty acres of western land if they lived on it and made improvements to it.

explanation: signed into law in may 1862, the homestead act opened up settlement in the western united states, allowing any american, including freed slaves, to put in a claim for up to 160 free acres of federal land. by the end of the civil war, 15,000 homestead claims had been established, and more followed in the postwar years

the constitution gives congress the power to regulate commerce "among" the several states.