The answer is (C). Everything else is <em>collective</em>, but money can be otherwise.
add notes to (a text or diagram) giving explanation or comment.
To rewrite the sentence you first must know the definition of ambiguous.
<u>Ambiguous: </u> open to more than one interpretation; having a double meaning or unclear or inexact because a choice between alternatives has not been made. (Definition straight from google)
People from all around the world today can use the Internet. This makes immediate communication <u>ambiguous.</u>