Answer:
A. People coordinate their activities, resulting in equilibrium in the market.
Step-by-step explanation:
Adam Smith - a proponent of Capitalist Economy 'Laissez Faire' i.e free markets proposed that :
Un-intervened (by govt) Markets guided by self interest create more wealth & over all socio economic welfare. Any disequilibrium will be sorted by undisturbed market forces, any government intervention is distortionary.