Which of the following is an example of a strategy you can use to ensure
others understand what you are saying?

The correct answer is:  

C. Two men embarked on a long and dangerous journey to the Cedar Forest in hopes of defeating the beast Humbaba.

As it is logical beginning of the passage:

Two men embarked on a long and dangerous journey to the Cedar Forest in hopes of defeating the beast Humbaba. Enkidu, who had met the beast, warned Gilgamesh of the dangers involved, explaining that Gilgamesh did not "know the horror that lurks ahead.” Upon seeing the beast Humbaba, Gilgamesh himself became seized with dread and terror. However, despite Enkidu’s warning and his own temporary paralysis upon seeing Humbaba, Gilgamesh charged at Humbaba with his axe. He demonstrated that he was able to summon the bravery necessary to overcome his fear and attack the frightening beast.