Which of the Following Criteria Must Be Met for the Heart

Multiple Choice

Which of the following criteria must be met for the heart to function efficiently?

A) Excitation and contraction of each heart chamber should be coordinated to ensure efficient pumping.
B) The atria should be excited and contract before the onset of ventricular contraction to ensure that ventricular filling is complete.
C) The right side of the heart should contract first to ensure that oxygenated blood is delivered to the heart before the left side contracts.
D) Both a and b
E) Both b and c