D>

If the Earth's axis were tilted at 50 degrees instead of the current 23.5 degrees we would get much less intense radiation at the surface in the winter (making it colder here then) and much more intense radiation during the spring to autumn (making the summer season warmer). We would also experience a different length to the days during all seasons, including June 21, than currently. In fact, our daylight would be MORE on June 21 than currently under these conditions. The only thing that would not change would be the TOTAL number of sunlight hours in a FULL YEAR as that is the same at every point on Earth. Think about that one! So the answer is A.