Answer: C. They had to reach a certain age
Explanation:
they had to reach an age where they could not work anymore before they could be freed
brainliest plz
<span> a revolution in communication occur in the 15th century
The first revolution in communication happened after Johanne Guttenberg developed the first movable printing in 1439, which allow people to easaily write and exchange information from one place to another</span>
Americans instituted an Open Door Policy both in China and Japan while Europeans insisted themselves by bringing addiction to the Chinese in the form of opium. Americans wanted to expand their trade and economy by creating the Open Door Policy for China to open their doors to the Americans. British people did not do this, they forced themselves into China which eventually led to their demise---the Opium Wars.
I don see the picture but off my knowledge, I think it would be the fact that invading through Italy allowed a 3 front war. This surrounded Hitler so he was defeated.
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