The answer is very much a war it’s either see you but I’m pretty sure the answer to a in my opinion
Probably: I get fewer hours of sleep these days? This might help: http://englishplus.com/grammar/00000214.htm
Nature
Nature is the most beautiful creation of God, that fills us with life, peace and love. When we take a time to just look what we have arroud us, we found an amazing bunch of creatures, colors and something inexplicable that the only way to know it, is living it. I had the opportunity to go the mountain and when I was at the top, I checked the view and took a deep breath and thought, sometimes we are looking for something incredible to live but that we don´t notice that nature is right in front of us and we are sometimes ungrateful with that.
I would say C. They caused him some discomfort. Hope this helps!