Which phrase defines “social context” best?

Which three parts of these excerpts reflect the idea that war affects not only the minds of the combatants but also their physical reactions?

Read the excerpt from a history of the world in 100 objects. power is usually not willingly given, but forcefully taken; and in both europe and america the nineteenth century was punctuated by political protest, with periodic revolutions on the continent, the civil war in america and, in britain, a steady struggle to widen the suffrage. what would be a benefit of reading this text rather than listening to an audio version of it? the reader could analyze the text features in the excerpt. the reader could visualize the description given. the reader could set his or her own pace and reread parts for clarity. the reader could hear the sounds of the political protest.

Mr and mrs van daan murmur their welcome what are the playwrights indicating by using the word murmur?