I think the answer is vigilant because it talks about how they have their hooves planted firmly on the ground with their heads high.
Option C is the correct answer.
The weary employees dreaded the long, boring meetings.
There are two adjectives, which need a comma in between them.
(Clarification)
The skeleton of the sentence is:
(subject)(predicate)(direct object)
(employees)(dreaded)(meetings)
In this sentence, the words "long, boring" modify the direct object "meetings".
Since there are two adjectives, they need a comma to separate them.
Hope this helps!
