Read the following excerpt from Joseph Stalin's radio broadcast on July 3, 1941: 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. which of the following is the most likely the meaning of "subordinating"

a) Fighting to survive in a difficult circumstances
b) Joining with others to achieve a common goal
c) Placing in a lower or less important position
d) achieving with an increased effort or energy

In the narrowest meaning of the word, "subordinating" means "establish an order of relationship between two linked beings, in which one becomes inferior and the other superior". However, in this case, the word subordinating is used in another context. To focus on the war industry, to the detriment to other ones, putting it on the top, and subordinate the lower ones.