Introduction of money has:
separated the acts of sale and purchase of an individual
combined the acts of sale and purchase of an individual
expanded the scope of sale and purchase
both (a) and (c)
Money has both separated the acts of purchase and sale, and expanded their scope.
Introduction of money has separated the acts of 'sale' and 'purchase'. How?
Which feature of money is reflected in the statement "It separated the act of sale and purchase?