The correct answer is indeed C. When people are doing ordinary things, such as eating or walking. the poem talks about the indifference that most people feel towards the suffering of others, that could be taken place "While someone else is eating or opening a window or just walking dully along".
Drive a car/bus fast or spin the wheels in a fast speed. <span />
Im not your "dears" that's the only reason why im not answering :)
