As humans travel in space, which gas is provided in the atmosphere of the spacecraft and which gas is removed from the atmosphere of the spacecraft?
Oxygen is provided. Carbon dioxide is removed. Carbon dioxide is provided. Oxygen is removed. Carbon dioxide is provided. Nitrogen is removed. Oxygen is provided. Nitrogen is removed.
Question: As humans travel in space, which gas is provided in the atmosphere of the spacecraft and which gas is removed from the atmosphere of the spacecraft?
A. Oxygen is provided. Carbon dioxide is removed.
B. Carbon dioxide is provided. Oxygen is removed.
C. Carbon dioxide is provided. Nitrogen is removed.
D. Oxygen is provided. Nitrogen is removed.
Answer: