What were the cause of the russian revolution

The Russian Revolution of 1917 was a period of conflict, which began in 1917, which toppled the Russian monarchy and brought Vladimir Lenin's Bolshevik Party to power. Newly industrialized and suffering from World War I, Russia had a large mass of workers and peasants working hard and earning little. Moreover, Tsar Nicholas II's absolutist government displeased the people who wanted less oppressive and more democratic leadership. The sum of the factors led to popular demonstrations that caused the monarch to resign and, at the end of the process, gave rise to the Soviet Union, the world's first socialist country, which lasted until 1991.

d. japan's attack on pearl harbor

the correct answer is “opportunity cost”. opportunity cost is what a company misses out because it decided in one option over another one. in this case, the company decided to invest in building a factory so it gave up another possible benefit or profit in order to achieve success with the factory.  

trade-off is not the correct answer since it is a situation in which you accept losing something in return for benefits in other areas.

and finally, consequence is a general term used to accept what it comes when you make a decision. it can be a positive or negative consequence depending if the decision you took was the correct one.