Answer: B. Describe, predict, explain and determine the causes of behavior.
Explanation: Scientific research on behavior should be able to give a description of the behavior being studied, the characteristics attached to individuals with such behavior. The study should enable accurate prediction of the behavior by giving distinctive attributes which differentiates such behavior from others. Give detailed information on the behavior and also enlighten on the likely causes of such behavior such as heredity, environmental factors and so on.
B. measuring is the answer because you need to know how to measure
During the 1820's the Cherokees' civilized to the "White Culture" (so they call it) and by that I mean that the White Settlers introduced crops and farming techniques.
The White Settlers also encouraged the Cherokee to put up a school for the Cherokee Children so that they could learn the English language.
Hope this helps, but this is just to the knowledge of what I know and what I was taught at that. :)