We need to determine correct subject-verb agreement.
The subject is “The state,” which is singular, even though “affairs” is plural — “affairs” is part of a prepositional phrase “of his affairs,” and does not affect the verb form.
Since the subject “state” is singular, the verb must also be singular — “was,” not “were” or “are.”
This eliminates options (A), (C), and (D) because they use plural verbs “were” or “are.”
Option (B) correctly matches singular “state” with singular “was” and is therefore grammatically correct.