The answer is B. Primary source
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Answer:
B. Statement 5
Explanation:
A thesis in this context can be referred to a statement or theory that is used as a premise to be proved.
From the fifth statement, it is hypothesised that identifying a fingerprint could be the most important tool in convicting a criminal. In subsequent statements, it is explained how a fingerprint is gotten from a crime scene and how it is unique and then checked through a database of other fingerprints of criminals.
