Answer:
The excerpt that is an example of zeugma is:
C. [H]e went down under an exceptional burden, more than 20 pounds of ammunition, plus the flak jacket and helmet and rations and water and toilet paper and tranquilizers and all the rest, plus the unweighed fear.
Step-by-step explanation:
Zeugma can be defined as a literary device that uses one word to refer to different things in different ways. For instance, let's take the verb "run". When we say "run out the door," we are using the verb in a literal way. However, when we say "run out of time," the verb is being used in a different way, since this time it does not indicate the action of rapidly moving from a place to another by using your legs. Thus, if we use "run" in both ways at the same time, we have an example of zeugma: He ran out of time and out the door.
Having that in mind, we can easily see that we have a zeugma in option C, where the word "burden" is used to refer to the literal burden of carrying heavy things and the figurative burden of fear.