About how much water is recycled in the form of rains per year?

• A
  $4.46 \times 10^5 \text{ g/year}$
• B
  $4.46 \times 10^{10} \text{ g/year}$
• C
  $4.46 \times 10^{20} \text{ g/year}$
• D
  $4.46 \times 10^{30} \text{ g/year}$