When Astronomers Carefully Examine the Planets Found by Kepler and Draw

Multiple Choice

When astronomers carefully examine the planets found by Kepler and draw conclusions from the Kepler sample, what do they conclude about planets the size of Earth?

A) Earth-sized planets are very rare in the Galaxy; our system is lucky to have one
B) Earth-sized planets are the main kind of planets found by far; Jupiter and Neptune sized planets are so rare, they almost never show up in our discoveries
C) Earth-sized planets are common, but so are planets somewhat bigger than Earth
D) Earth-sized planets are only found in systems that also have hot Jupiters
E) none of the above