Current Models Suggest That If Europa Does Indeed Have a Subsurface

Current models suggest that if Europa does indeed have a subsurface ocean, it

A) could contain roughly a hundred times as much water as all of Earth's oceans combined
B) could contain roughly twice as much water as all of Earth's oceans combined
C) should contain roughly half as much water as all of Earth's oceans combined
D) should contain much less water than all the Earth's oceans combined