At What Two Celestial Locations Do the Celestial Equator and Ecliptic

Multiple Choice

At what two celestial locations do the celestial equator and ecliptic coincide

A) winter solstice and summer solstice
B) vernal equinox and autumnal equinox
C) They coincide at all points because they are the same.
D) north celestial pole and south celestial pole
E) zenith and east point