Sunspots generally wax and wane over a/an

A. 11-year cycle

B. 25-year cycle

C. 3-year cycle

D. 15-year cycle

Answer: Option A

Solution(By Examveda Team)

Sunspots generally wax and wane over an 11-year cycle. Centuries of observations have shown that the number of sunspots waxes and wanes over a roughly 11-year period. Sunspots exhibit other predictable behavior.