The _____ a Period _______, That Coincides with _______

The _____ a period _______, that coincides with _______.

A) sunspot cycle is; of 11 years; the Sun's rotation around its axis
B) Maunder Minimum is; of low sunspot activity; the "little ice age" in the late 17 ^th century
C) magnetic cycle is; of 22 years; a period of intense solar and earthquakes
D) solar cycle is; of high sunspot activity; the cycle of the planetary alignments