What Is the Cause of an Annular Eclipse

What is the cause of an annular eclipse?

A) Earth's position in its orbit is near aphelion, its farthest point from the Sun.
B) Earth's position in its orbit is near perihelion, its nearest point to the Sun.
C) The Moon's position in its orbit is near apogee, its farthest point from Earth.
D) The Moon's position in its orbit is near perigee, its nearest point to Earth.