Read the excerpt from The Communist Manifesto. Let the ruling classes tremble at a Communistic revolution. The proletarians [workers] have nothing to lose but their chains. They have a world to win. Working men of all countries, unite!

What is the best meaning of “The proletarians have nothing to lose but their chains”?

Workers should take care not to lose their personal property.
Workers are so oppressed that they should revolt.
A failed revolt will land the revolutionaries in prison, in chains.
It is unjust to hold communist revolutionaries in chains.

Workers are so oppressed they should revolt

Explanation:

most likely

although the crusades failed to capture jerusalem, they had several major impacts on western europe. they increased the authority of the king: sometimes nobles died in battle without leaving an heir in which case the king got their land. kings passed taxes to pay for the crusades.

answer: the time zones used to be whatever the local authority wanted them to be. one town might have 6am whenever the sun came up and another town had 6am 10 minutes later.  

the trains had a hard time when their orders said to be at a certain point at 6am.  

6am, but who's 6am.  

the railroads got together and set the time zones more or less along the longitude lines across the country.

explanation: