Final answer:
The use of required sources takes precedence over simplified acquisition procedures, which is true. Land acquisition was central to early U.S. Indian policy, also true.
Step-by-step explanation:
The use of required sources of supplies or services indeed takes precedence over the use of simplified acquisition procedures. This is because government contracting has strict rules to ensure that government purchases meet legal standards and that procurements serve the public interest.
The simplified acquisition thresholds are designed to facilitate easier procurement of goods and services under certain financial limits. However, when there are pre-existing contracts or required sources, these take priority regardless of the convenience of simplified procedures. The answer to the question is a) True.
In response to Exercise 11.1.2 and the related queries about early U.S. Indian policy and the acquisition of land, it is also a) True that land acquisition was a significant motivating factor. The drive to expand territory and economic growth led to policies that often displaced Native American populations.
Regarding the necessary and proper clause in Exercise 9.3.1, this clause has actually expanded the powers of the national government over time, as it allows for the creation of laws deemed necessary and proper for carrying out the enumerated powers. Hence, the answer is b) False.
Finally, addressing the SELF-CHECK QUESTIONS about the source of comparative advantage, it is b) False that comparative advantage must come solely from natural elements like climate and mineral deposits. Comparative advantage can result from a variety of factors, such as technology, skilled labor, and innovative business practices.