It seems like you've referenced a specific "Global Atmospheric Circulation image" and asked me to help with labeling choices and identifying the area receiving the most direct sunlight. However, I don't have access to images or specific content beyond text.
To answer your question regarding which area gets the most direct sunlight throughout every season, the answer is typically the equatorial region, often represented by a point or area near the equator on a globe.
If you can describe the labels A, B, and C in relation to the image, I’ll do my best to assist you further!