Which of the following is incorrect?

(A) Within the Arctic and Antarctic Circles there is at least one
day in the year during which the sun does not set and at least one
day on which it never rises
(B) At the North Pole there is darkness for half the year
(C) At the summer solstice the sun shines vertically over the
Tropic of Capricorn
(D) The sun shines vertically over the Equator twice the year