Using Critical Thinking,select the Underlying Effect That Results from Taking

Using critical thinking,select the underlying effect that results from taking propranolol,a beta-blocking drug that directly decreases heart rate,force of contraction,and conduction velocity of the heart.

A) Increase in oxygen consumption by the body
B) Decrease in oxygen consumption by the body
C) Decrease in drug metabolism by the liver
D) None of these are correct.