What causes a partial lunar eclipse? a. Only the penumbra of the Earth passes across the Moon creating a circular shadow.

b. The Earth's umbra fits inside the Moon creating an illuminated ring known as a annular eclipse.

c. A partial eclipse causes the Moon to turn reddish from the refraction of the Sun's ray through the Earth atmosphere.

d. The Earth's umbra only cover a part of the Moon causing a circular shadow to pass across it.