i would say A).Simon Bolivars death. because i believe he had something to do with the colonization of Latin america and when he died then people gained independence.
Hope this helps
There were lots of uncontrollable strikes in Petrograd, ones which he tried to send out his army to to save. However, his soldiers then refused to let fire on the protesters. He then weakened a huge amount and lost great chunks of his supporters. This meant he had to abdicate
