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C. might be the correct answer.
Here, the verb catch is a transitive verb, but the object/agent is missing. The action of catching a thief devolves onto the police or the people. So, we need to create the agent as per the context. The thief has been caught by the people/ police/them.
Consequently, the active form of the sentence will be:
The police has caught the thief.
The people have caught the thief.
They have caught the thief.
pip find out how horrible he has been and the extent of his dirty deeds
They will only lose more freedom to the British if they don’t
