Given That CO2 Is Produced by Cellular Respiration,why Does the Amount

Multiple Choice

Given that CO2 is produced by cellular respiration,why does the amount of CO2 in the atmosphere remain relatively constant? (When answering this question,exclude the impact of human activities on atmospheric CO2.)

A) CO2 mostly forms carbonate rocks.
B) CO2 is converted in photosynthesis to carbohydrates.
C) CO2 is split apart during photosynthesis.
D) CO2 is trapped in dead organisms' bodies.