We must strengthen the red army's rear, subordinating all our work to this cause, all our industries must be got to work with greater intensity to produce more rifles, machine-guns, artillery, bullets, shells, airplanes; we must organize the guarding of factories, power stations, telephonic and telegraphic communications, and arrange effective air-raid protection in all localities. based on this excerpt, what is most likely the meaning of "subordinating"? a. placing in a lower or less important position b. achieving with increased effort or energy c. fighting to survive in difficult circumstances d. joining with others to achieve a c