Its b i think but i might be wrong i looked it up
Because they have the most direct sunlight possible.
Answer:
is USA
Explanation:
I just but the best way to get right u ask or your teacher
Mesosphere is the layer after stratosphere, which is after troposphere, as seen from Earth in the direction of Space.
It starts at 60 km and ends at 120 km, after which comes the termosphere.
So we're looking for a line that's closest to 100 km, and this is the shortest line, A.
The answer to your question is A