Answer:
C
Explanation:
Not everyone will have access to one format, if you are trying to communicate with your whole community, you shouldn't avoid anyone, and depending on how many languages are in your community, you probably couldn't learn them all.
Making objective observations
I believe the correct answer is exercitui.
You need the perfect passive form here, which is formed when you combine the verb esse in the present tense (here, sunt because of third person plural), and the appropriate participle in the same person, which in this case is exercitui - third person plural.
We need to see the whole picture in order to figure it out. Because we can't see the top of the page