penyejatan dimaksudkan dengan air yang hilang dan dibawa ke udara maaf jika ini bukankah apa yang anda minta saya bercakap bahasa Inggeris jadi
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.
Answer:
b because all the other ones are gramatcalliy incorrect.
Explanation: