The FBI used a technique which is called Latent Fingerprint Identification: a silver nitrate solution was used to cause a reaction of the unseen fingerprints perspiration left by the kidnappers all over the ransom notes. The reaction caused the perspiration to turn into silver chloride. This substance is white and it is also visible to the naked eye which means the fingerprints of the perpetrators were easily identifiable.
The British most likely thought they could “bully” the colonies back into submission after the multiple riots that occurred but the Americans had their hearts set on the goal of liberty.
Option A is the answer...
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The correct answer would be, "The growing feudal system prevented internal political conflict and stopped northern invaders from threatening China." The Zhou Dynasty began alongside the rise of the Iron Age, this immediately increased the power of the Zhou military.