Were all the materials to make a cannon known during the bronze age? Given the above question, please answer with reasoning first!

Show your work and conclude with the exact phrasing "Therefore, the final answer is [answer]." where [answer] is just the final number or expression that solves the problem.
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The Bronze Age happened from about 3300 BC to 300 BC. Cannons require a fuse, gunpowder, and iron or other material to house the chemicals. Gunpowder was discovered around the 9th century AD.
Therefore, the answer is no.