The Difference Between an Umbral Eclipse and a Penumbral Eclipse

The difference between an umbral eclipse and a penumbral eclipse is:

A) entirely dependent on your viewing position on Earth.
B) whether the Moon is farther from the Sun than Earth is or whether it is closer to the Sun than Earth is.
C) the distance of the Moon above or below the ecliptic.
D) whether Earth's rotation axis is tilted toward or away from the Moon during the eclipse.