Maybe post the picture to your problem if you need help
The answer is E.
A, B, C, and D are either irrelevant or already included.
I believe the answer is D. The NASA mission which sent a probe to collide with a comet's nucleus is the Deep Impact. It is the first mission sent in order to see the interior of a comet. The comet that was aimed was called the Comet Tempel 1.
The 90-degree angle would be hotter since this is receiving the most direct sunlight concentrated in a smaller area. In areas at the equator, the angle of incoming rays from the Sun is perpendicular (90 degrees) to the Earth's surface during all days of the year. Such areas experience warm climates throughout the year