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1813 Physiology

As a part of the space-research program, a physiologist was asked to investigate the effect of flight-induced stress on blood pressure. Accordingly, the blood pressure of the cosmonauts was to be measured twice: once before the take-off and once after the spacecraft entered the designated orbit around the earth. For a proper comparison, the preflight blood pressure should be recorded in

AThe lying down position
BThe sitting position
CThe standing position
DAny position, as long as the post-flight recording is made in the same position
Physiology
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