Clients weight is taken before and after participating in the latest fitness craze for a month. What is the simplest test to see if there is an effect of the fitness craze

What is the purpose of the tenth amendment? a. to establish the electoral college b. to give each state constitution the same protection as the federal constitution c. to grant to the citizens of each state access to the federal court system powers d. to limit the power of the central government by establishing reserved powers for states and individuals