D seems like the most correct.
Answer:
well today I went into school and went to my favorite teachers class room and seen random blood splatters on the wall and when I went to go sit down I smelt the nasty smell of decaying flesh looked and seen my favorite teacher was a zombie I ran out of the class and heard some growling seen another zombie!! I am freaking out I pull out a stick I forgot about in my bag I start slowly approaching the zombie and peirce the brain and the zombie dies then I run out of the school to live to fight another day
I believe it is a compound sentence
To save a whale, you can try to not liter in oceans. Because some whales die from pollution.