Four-Year Old Sammy Is Having a Temper-Tantrum

Multiple Choice

Four-year old Sammy is having a temper-tantrum.In a final attempt to get his way,he yells to his mom,"I'm gonna hold my breath 'til I die!" What is the primary reason that Sammy's mom is unconcerned by this statement?

A) Sammy is too young to hold his breath for more than 30 seconds.
B) It is impossible for Sammy to control the contraction of his diaphragm and intercostal muscles since they are made up of smooth muscle.
C) As Sammy holds his breath,the decreasing levels of oxygen in his blood will lead to stimulation of the respiratory control center in his brain.
D) As Sammy holds his breath,the increasing levels of carbon dioxide in his blood will lead to stimulation of the respiratory control center in his brain.