How could enslaved people gain their freedom in Roman society?

The slaves in Rome were able to obtain their freedom in various ways.

Explanation:

Roman slaves were able to earn their freedom during the service. Sometimes a good deed meant for the owner could mean freedom. Slaves could also gain freedom after years of loyalty and attachment to their owner, who proved to be friends with their owners. The Manumission was a public ceremony performed before a magistrate.

The slave owner would touch his slave with his stick on his head, after which the slave would become free. There are also sometimes more accessible ways to release slaves, for example, when a slave owner announces to his family and friends that he is releasing a slave or only inviting a slave to his table at a family dinner. Some slaves became influential citizens after their liberation.

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your answer would be (b)