In the horizon system of coordinates what is equivalent to latitude on the Earth?（）.

A.Prime vertical circle
B.Principal vertical circle
C.Parallels of altitude
D.Horizon

A.be circumpolar
B.have a declination equal to or greater than your latitude
C.have a GHA of 180°
D.have the SHA equal to or less than the LHA

A.sunrise
B.1200 LMT
C.sunset
D.2400 LMT