Answer:
D) Most people figured that Columbus discovered America, made friends with the Indians, and then told everyone else about this land.
Explanation:
Revision of any text or passage is need for a number of reasons, ranging from a simple grammar mistake to making the paper more precise, focused, structured, etc. The revision also allows for improved analytical skills, challenging one's own ideas, more strengthened argument, etc.
Among the given sentences, the one that needs to be revised is sentence D. Looking at the words used in this particular sentence, it is evident that the words are too informal, be it using<em> "most people figured", "made friends", or "told everyone else"</em>. They make the sentence too simple, too friendly, something one does with a close friend or relative. If these words are revised with words like 'most people believed', 'formed close relationship/ befriended', or 'revealed to everyone', then that makes the sentence seem more formal.
Thus, the correct answer is option D.