Once photosynthesis evolved oxygen started to be released to Earth's atmosphere. why did it 1 point take a long time for oxygen to start to build up in the air?
A)because all the living organisms breathed it up
B)because the rain would wash it away
C)it was soaked up by ice
D)It was soaked up by the iron in rocks and iron in the ocean

Try to answer all questions if possible i will take anything this is worth 21 ! ! 1. what rights do citizen's have in a monarchy? 2. what countries practice monarchy? 3. what is one advantage of a monarchy? 4. what is one disadvantage of a monarchy? 5. what rights do citizen's have in a dictatorship? 6. what countries practice dictatorship? 7. what is one advantage of dictatorship? 8. what is one disadvantage of dictatorship?