Question

how long ago did oceans begin to form?
o 12.5 mya
o 137 mya
o 285 mya
o 3800 mya

Explanation:

The Earth's oceans began to form around 3800 million years ago (MYA) as water vapor condensed and accumulated on the Earth's surface. This was a result of outgassing from volcanoes and other geological processes early in Earth's history.

Answer:

3800 MYA