Fill in the blank with the most appropriate word.
People think he is guilty. He ________ guilty.
An action in a sentence can be represented in two ways, namely active and passive voice.
The passive voice always uses the past participle form of the main verb irrespective of any tense. Only the auxiliary verbs depend upon the sentence given in active voice.
The given sentence is in the active voice.
The correct answer is C) is thought to be as the sentence is the simple present tense.
Options A, B, and D are not correct as the auxiliary verb is missing, the main verb (thinks) is not transformed, and the sentence does not indicate of the past.