When Messner and Habeler Climbed Mount Everest Without Supplemental Oxygen,the $\bullet$

Multiple Choice

When Messner and Habeler climbed Mount Everest without supplemental oxygen,the scientists had to reevaluate their calculations that VO₂ max at the top of Everest was equal to resting metabolic rate (3.5 ml $\bullet$ kg^-1 $\bullet$ min^-1) .They discovered that the

A) barometric pressure was higher than expected at the top of Everest.
B) oxygen percentage was higher than expected at the top of Everest.
C) the air contained more oxygen than expected.
D) hemoglobin levels increased suddenly at that altitude for those who didn't use supplemental oxygen.