Which motivation would McClelland say was the major need driving Blake Mycoskie to continue to work so hard despite being worth millions of dollars?

ACHIEVEMENT method of motivation.

Explanation: McClelland Achievement theory explains that an individual has three main motivators. They are, the need for; power, achievement and affiliation.

An individual that continues to work so hard despite being worth millions of dollars is likely to be driven by the ACHIEVEMENT factor of motivation.

The Achievement method of motivation illustrates the relationship between an individual's distinguishing feature and their need to succeed.

the united states constitution is the supreme law of the united states. the constitution, originally comprising seven articles, delineates the national frame of government. its first three articles embody the doctrine of the separation of powers, whereby the federal government is divided into three branches: the legislative, consisting of the bicameral congress; the executive, consisting of the president; and the judicial, consisting of the supreme court and other federal courts. articles four, five and six embody concepts of federalism, describing the rights and responsibilities of state governments, the states in relationship to the federal government, and the shared process of constitutional amendment. article seven establishes the procedure subsequently used by the thirteen states to ratify it. it is regarded as the oldest written and codified national constitution in force.

i would say b. research typically uses a variety of sources