The correct answer is (A).
Getting to the Answer: Use the Figure to determine the relationship between the number of sunspots and the Sun's brightness at a particular wavelength. The Figure shows that the number of sunspots tends to increase as brightness increases. So, the number of sunspots is greatest at maximum brightness and lowest at minimum brightness.
(A) Correct: this matches the analysis above; the number of sunspots is highest when the Sun is near its maximum brightness
(B) Incorrect: the number of sunspots is highest, not lowest, when the Sun is near its maximum brightness
(C) Incorrect: the number of sunspots is highest when the Sun is near its maximum brightness, not near both its maximum and minimum brightness
(D) Incorrect: the number of sunspots is lowest when the Sun is near its minimum brightness, not near both its maximum and minimum brightness
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