Which of the following was not a policy followed by many of russia's tsars?
a. centralization of power
b. isolationism
c. territorial expansion
d. westernization

"westernization" is the one among the following choices given in the question that was  not a policy followed by many of russia's tsars. the correct option among all the options that are given in the question is the fourth option or option "d". i hope that this is the answer that you were looking for and the answer has come to your desired .