each? Could you specify a bit more please.
The answer is D, because it is a known fact that is it mandatory for children to go to school.
Because the status of National Park comes with federal protection and funding to go towards conservation. Even if there aren't that many visitors, tourism still creates revenue to go towards maintaining America's wild lands.
The correct answer would be
D) According to Scholastic Book Records 2011, soccer player Lionel Messi makes over $39 million dollars annually. This impressive salary is from his work as a striker for La Liga's Barcelona team (page 99).
This is correct because it leaves your point of view out, it has correct grammar, and it gives you the source.