Which statement about wind is not true?
a. winds around the equator are light.
b. wind direction is affected by the earth’s rotation.
c. winds at about 30° north and south latitudes are heavy.
d. the trade winds blow steadily toward the equator.

C. Winds at about 30° North and South latitudes are heavy

Explanation:

The formation of the winds system is characterized by the trade wind that occurs in the 30 degrees north and south of the equator and hence is called the easterlies. These are low winds as the realm of these wind is located in the equatorial low-pressure belt. Thus gives rise to the Hadley cells that move towards the polar areas.

The sun's parallax would be 180 degrees, greater than which you can't get.  so a. would be your anwser 

The correct answer should be brand c.