What was a common political factor for united states-aligned states in europe during the cold war?

a. they lived behind the iron curtain
b. they had one political party
c. they held free elections
d. they had communists governments

i know for sure its not a because it said it was wrong.

the china one is last

explanation:

the han greatly expands the chinese empire. the han dynasty retains the centralized bureaucracy and unified political system of the qin but adopts and grafts upon this the confucian view that government should be run by educated, ethical men.

explanation:

not sure but thinking i'ts cause the government was broke. not sure