Siberia has experienced many environmental problems because of

The choices can be found elsewhere and as follows:

difficulties transporting goods
fighting during World War II
privatization of industry
policies during the Soviet era

I believe the correct answer is the last option. Siberia has experienced many environmental problems because of policies during the Soviet era. 

The answer is d if you are on edgenuity. 

The were examples of police  brutality  and prideful people. police brutality because they could have acted differently. and prideful people because even if you are treated wrong you should still humble your self to the law that is before you.