The erythrocyte count increases after a while when an individual goes from a low to a high altitude because the a. temperature is lower at higher altitudes b. concentration of oxygen and/or total atmospheric pressure is lower at high altitudes c. basal metabolic rate is higher at high altitudes d. concentration of oxygen and/or total atmospheric pressure is higher at higher altitudes

the answer is b

explanation:

evidence and logical support is essential for a scientist to do in order to maintain credibility. this is because no one can believe without any logic and without any evidence.hence a scientist can maintain credibility by proving himself and by answering logically so experiments prove very beneficial. logical hypothesis give conclusion which is acceptable. therefore, there are two main factors to maintain credibility by a scientist is evidence and logical support.

it's c.us forest service