Remove! extraneous means irrelevent
Answer :
<h2><em>The right answer would be</em>
C</h2>
The phrase <em>eating a peanut butter sandwich </em>is a gerund phrase, given that the word <em>eating </em>is a gerund.
The purpose of exposition (or expository writing) is not primarily to amuse, but to enlighten and instruct. The objective is to explain and analyze information by presenting an idea, relevant evidence, and appropriate discussion. Its essential quality is clarity.