HELP PlS !! What caused the formation of the “Eastern Bloc” ? or Why was the “Eastern Bloc” formed ?

where is the passage?

can't without the passage.

post the full question.

  the common sense as a pamphlet written by thomas paine. it promoted the independence of the colonies from british rule. the distribution of this pamphlet was great, it reached people everywhere and it was even read aloud at places people met. it also unite the colonists before the revolutionary war.

answer is d