A.
the time for Earth to complete one revolution
B.
the time for stars to complete one rotation
C.
the time for Earth to complete one rotation
D.
the time for the sun to complete one rotation
1 answer
https://www.google.com/search?source=hp&ei=qpGSXJHeNcfIsQWHgrqgBA&q=solar+day+definition&oq=+solar+day&gs_l=psy-ab.1.1.0l10.3896.3896..8457...0.0..0.105.105.0j1......0....2j1..gws-wiz.....0.JCD3Ye96Ooc