Our Speculation About the Possibility That Life Might Exist in the Harsh

Our speculation about the possibility that life might exist in the harsh environment of Europa's subsurface oceans or in the ice-based permafrost of Mars has recently been given a boost with the discovery of life in the similarly harsh environment:

A) on the far side of the Moon.
B) in a lake deep beneath the Antarctic ice pack.
C) on meteoroids.
D) in the cold, rarified upper atmosphere above Earth's poles.