Hello Sophuechait2,
Your answer would be:
C. Compare definitions for the word with its synonyms.
I believe this correct because if you don’t know the true definition of the word synonymous that are similar to this word might help you out.
~Rendorforestmusic
<span>Over the course of two years, Gulliver describes the state of affairs in Europe, speaking to his Houyhnhnm master about the English Revolution and the war with France. He is asked to explain the causes of war, and he does his best to provide reasons. He is also asked to speak of law and the justice system, which he does in some detail, criticizing lawyers severely in the process.</span>
The root should be "Mort" and the meaning of that , well its a base to a Latin word wich basically means "Death", hope this helped