can you please help me with this earth science questions

Question

In December, a city in the Southern Hemisphere has warm weather all month long.

What causes this to happen?

A. The city experiences fewer hours of daylight.

B. The city is experiencing a winter solstice.

C. There is a high concentration of the Sun’s rays in that region.

D. The Sun reaches its highest point in the sky during this month.

Answer 1

option C it's the right one, because the earth has its axis with 23,7° and that month the south hemisphere receives a higher ray lights concentration from the sun.