Use the following information to answer the questions below.
A spaceship is designed to support animal life for a multiyear voyage to the outer planets of the solar system.Plants will be grown to provide oxygen and to recycle carbon dioxide.
-If the power fails and the lights go dark,what will happen to CO₂ levels?

A)CO₂ will rise as a result of both animal and plant respiration.
B)CO₂ will rise as a result of animal respiration only.
C)CO₂ will remain balanced because plants will continue to fix CO₂ in the dark.
D)CO₂ will fall because plants will increase CO₂ fixation.
E)CO₂ will fall because plants will cease to respire in the dark.