Which major accomplishments were achieved within the persian empire?

choose all answers that are correct.

built a vast network of roads

introduced architectural styles and farming techniques from other parts of the world

created the first written laws

encouraged religious tolerance

What was one of the most important causes of the russian revolution of 1917? a. the german occupation of russia during world war ii b. the bolsheviks execution of czar nicholas ii and his family c. csar nicholas ii refusal to withdraw from world war 1 d. the policy of ethnic discrimination put in place by the duma