Perhaps the MOST convincing piece of evidence suggesting that ...

[crobinson2013]

Perhaps the MOST convincing piece of evidence suggesting that Europa has a subsurface ocean is the
 
  A) fact that the magnetic field of Jupiter is able to induce a magnetic field in Europa consistent with a salty ocean beneath its crust
  B) fact that calculations suggest that there is enough internal heat to keep the ice melted beneath the crust
  C) lack of impact craters on its surface
  D) observation of iceberg-like features on its surface

Question 2

If observations had shown that the cosmic microwave background was perfectly smooth (rather than having very slight variations in temperature), then we would have no way to account for
 
  A) the relationship between the strong and the weak force.
  B) the fact that our universe is expanding.
  C) how galaxies came to exist.
  D) the existence of helium in the universe.

[sierrahalpin]

Answer to Question 1

A

Answer to Question 2

C

[crobinson2013]

TYSM

[xiazhe]

Gracias!