To increase oxygen delivery to working muscles during exercise, heart rate increases. Barry's heart rate has increased from 60 beats per minute (bpm) at rest, to 120 bpm during a run. What happens to the time taken for each cardiac cycle

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