Regarding a Healthy Recreational Scuba Diver at a Depth of 66

Regarding a healthy recreational scuba diver at a depth of 66 feet in the Caribbean Sea, which statement is true?

A) Her lungs are smaller than normal
B) She has an elevated arterial pO₂ and a normal pCO₂
C) All gas partial pressures in her blood (oxygen, nitrogen, carbon dioxide and water vapor) are elevated
D) There are increases in both fraction of inspired oxygen (FiO₂) and inspired nitrogen (FiN₂)