Paradoxical Breathing Type I Has the End Result of Upper

Multiple Choice

Paradoxical breathing type I has the end result of upper chest wall collapse because of which of the following muscular functions?

A) Lack of stabilizing contractions of the intercostal
B) The diaphragm fails to descend into the abdomen
C) The abdominal muscle contract decreasing the diaphragms descent into the abdomen
D) The upper respiratory muscles are unopposed in their pull of the chest wall superiorly