In What Way Was Russia's Expansion in Asia Different from American

In what way was Russia's expansion in Asia different from American expansion in North America?

A) Russia wished to exploit rich mineral resources instead of opening up land for farming.
B) Russia stressed the cultural differences between itself and the peoples it conquered.
C) The monetary cost of expansion for Russia and its people was far greater.
D) Russia tolerated and taxed native populations instead of displacing or slaughtering them.