After Observing That a Child with Tetralogy of Fallot Has

After observing that a child with Tetralogy of Fallot has severe shortness of breath, the nurse immediately positions the child in the squatting position. How will this position help to resolve the child's condition?

A) By increasing the arterial blood pressure
B) By decreasing the resistance in the first section of the aorta
C) By activating the renin-angiotensin-aldosterone system
D) By increasing the peripheral vascular resistance against the left ventricle