A subject of Rome is referred to a person who is either a citizen of Rome or is under protection of the Roman Law. As per this law, a citizenship is the most important criteria for anyone to be called as a subject of Rome.
Citizenship is such fundamental right in the hands of a person as such, who is considered a resident of the state of such by satisfying the conditions as may apply.
In case of the Roman Law, a citizen of Rome is referred to as the subject of Rome, as he comes under the ambit of it as per the provisions of the law of Rome.
Hence, option B; a citizen of Rome, or someone who has a citizenship of Rome comes under the purview of the subject of Rome as per the provisions of the Roman Law.
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