Answer: option D.
The total number of atoms of each element on both sides of the
equation must be the same.
Explanation:
Answer: B is the answer i believe.
Every 2 million years the amount is halved
0 million = 200g
2 million = 200g/2 = 100g
4 million = 100g/2 = 50g
C is the answer hope the answer is right
