You respond to a boat dock for a diving injury. You find a​ 24-year-old male patient unresponsive with frothy blood in the mouth and lung sounds absent on the right side. The patient is breathing 28 times a minute. Given the mechanism of​ injury, you​ should:

A. Perform both a primary and secondary assessment.
B. Perform only a primary assessment.
C. Immediately perform a rapid trauma assessment.
D. Immediately rule out medical conditions as an underlying cause.