Answer:
<u>M</u><u>A</u><u>R</u><u>K</u><u> </u><u>M</u><u>E</u><u> </u><u>A</u><u>S</u><u> </u><u>A</u><u> </u><u>B</u><u>R</u><u>A</u><u>I</u><u>N</u><u>L</u><u>I</u><u>E</u><u>S</u><u>T</u>
<em>p</em><em>a</em><em> </em><em>m</em><em>a</em><em>r</em><em>k</em><em> </em><em>p</em><em>o</em><em> </em><em>a</em><em>k</em><em>o</em><em> </em><em>p</em><em>l</em><em>e</em><em>a</em><em>s</em><em>e</em>
the authors purpose is to inform readers, so therefore it needs to be understandable and clear how to do what the reader went to the source to learn how to do, so, A would be the answer.
hope this helps!