The social cleavages perspective in sociology is concerned with what?

Before tuberculosis was understood to be a communicable disease, and before the discovery of antibiotics to treat it, a major outbreak could kill or cripple a significant portion of a nation’s labor force. how would such an event affect the economy? illustrate the effect by dragging to shift either the aggregate demand curve or the long-run aggregate supply curve.

Which type of evidence would support the author's claim?

Which best describes why it is necessary to evaluate a solution?