I am crossed between B and D but I think the answer is D because the mountains are in a high altitude so it is tall enough to touch the skies and with that the winds hit the mountains. <span />
<span> rugged terrain
transportation
difficulties
I hope I help </span>
There are about 200 billion stars in our galaxy, with 40 billion of them like our sun, Marcy said. One of his co-authors put the number of sun-like stars closer to 50 billion, meaning there would be at least 11 billion planets like ours