The circumstances Chief Red Cloud and his people were facing before they were placed on reservations?the circumstances Chief Red Cloud and his people were facing before they were placed on reservations?

The right answer is Red Cloud describes the situation as bleak; with little food and fading traditions, they felt one of their only choices was to agree to reservation life and adopt white American ways." 

Explanation:

In 1871, the government established the Red Cloud Agency on the Platte River, downstream from Fort Laramie. As outlined in the 1868 Treaty, the agency staff were responsible for issuing weekly rations to the Oglala, as well as providing the annually distributed supply of cash and annuity goods. The agent and Washington officials would determine how much of the annuity was to be paid in cash or goods, and sometimes the supplies were late, in poor condition, inadequate in amount, or never arrived at all. Red Cloud took his band to the agency (a predecessor of the Native American reservation) and tried to help them in the transition to a different way of life. In the fall of 1873, the agency was removed to the upper White River in northwestern Nebraska.  

answer:

d. because dr. laguardia selected a widely used measure, his study generalizes to has strong external validity. external validity has limited external validity. other applications of this measure.

the widely used measure that he applied to his experiment was the benton facial recognition test. it employed on to football players and as result, only players who suffered brain concussions did not pas this test. and although it has an external validity, it is limited because it isn't general to apply to other population.

i'll just take the points xd