I think it would be A End of the Cold War.
Hope I helped!
Answer:
i believe its a
Explanation:
the Colorado river runs through the grand canyon
Answer: Consistency and Accuracy
Explanation:
Consistency tends to prove how reliable a test can be while to know it's validity we check how accurate it it is.
The population decreased because of diseases brought in by the white settlers that the Native Americans were not used to
Answer: Option (c) is correct.
Explanation:
Average propensity to consume refers to the fraction of income that is spent on consumption. It is determined by dividing the consumption level of an individual by income.
Average propensity to consume (APC) = 
Hence, as the income of an individual increases, as a result average propensity to consume falls because the denominator part of an equation become more larger than the numerator part.