Suppose you live at latitude 40 degrees N. Which of the following describes the conditions that make a star circumpolar?

A) stars are circumpolar if they have declination > +50 degrees
B) no stars are circumpolar at this latitude
C) stars are circumpolar is they have right ascension > 6 hr
D) stars are circumpolar is they have right ascension < 6 hr
E) stars are circumpolar is they have declination > +40 degrees