What Was One of the Chief Goals of Ivan the Terrible

What was one of the chief goals of Ivan the Terrible and his successors?

A) To weaken the Holy Roman Emperors enough to take Hungary away from them
B) To expand and make Muscovy the heart of a mighty Russian Empire
C) To convert western nobles to Orthodox Christianity and absorb the newly converted territories
D) To tightly restrict economic, social, and intellectual contact with the "ungodly" West