Precession of Earth's Spin Axis Results in

Multiple Choice

Precession of Earth's spin axis results in

A) changes of the positions of the constellations that are visible at night from Earth over the period of 1 year.
B) a gradual shift of the vernal equinox along the ecliptic.
C) a daily shift in the position of the overhead direction (the zenith) of an observer relative to the celestial equator (for an observer at a fixed location on Earth) .
D) a gradual change in the angle between the ecliptic and the celestial equator.