A​ 25-year-old male is complaining of difficulty breathing after a submersion​ (near-drowning) injury. He says that the breathing difficulty​ ""came on all of a​ sudden."" You note rales when listening to his chest. His vital signs are P​ 120, R​ 36, BP​ 130/88. You should​ next:
A.assist with a bronchodilator inhaler.
B.administer nitroglycerin.
C.administer CPAP.
D.administer a​ small-volume nebulizer.