During the russian civil war, the communist state took over control of
a. factories
c. mines
b. banks
d. all of the above

During the Russian civil war, the Communist state took over control of "all of the above" things, since the Communists were interested in implemented a "command economy". 

During the Russian civil war, the communist state took over the control of all of the above. The communists tok over the factories, mines, and banks. They had to do this so that they were able to have ful control over the state. This enabled them govern the country as they pleased.