Consider the following statements:1. The Earth's magnetic field has reversed every few hundred thousand years.2. When the Earth was created more than 4000 million years ago, there was 54% oxygen and no carbon dioxide.3. When living organisms originated, they modified the early atmosphere of the Earth.Which of the statements given above is/are correct?

Consider the following statements:1. The Earth's magnetic field has re

1.	Consider the following statements:1. The Earth's magnetic field has reversed every few hundred thousand years.2. When the Earth was created more than 4000 million years ago, there was 54% oxygen and no carbon dioxide.3. When living organisms originated, they modified the early atmosphere of the Earth.Which of the statements given above is/are correct?
A.	1 only
B.	2 and 3 only
C.	1 and 3 only
D.	1, 2 and 3
Answer» D. 1, 2 and 3