The answer should be A. This is because the other sentences don't need any word except for the first word in its sentence.
In the answer choice A, partners in Water partners should be capitalized because it is an organization. Therefore the sentence should be...
"<span>It was started in 2009 by actor Matt Damon and Gary White, the co-founder of Water Partners."</span>
C. The more a witness’s account is told, the less accurate it is
Point of view is the events told by the character & voice is somebody else saying it
B. describe the features and functions of web based email programs, would lend itself better to a chart where you would list each type of email program and its features.