The Evolution of the Payments System from Barter to Precious

question 47

Multiple Choice

The evolution of the payments system from barter to precious metals,then to fiat money,then to checks can best be understood as a consequence of

• A)government regulations designed to improve the efficiency of the payments system.
• B)government regulations designed to promote the safety of the payments system.
• C)innovations that reduced the costs of exchanging goods and services.
• D)competition among firms to make it easier for customers to purchase their products.

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Definitions:

Plasma Antibodies

Proteins found in plasma that are produced by the immune system to identify and neutralize foreign objects like bacteria and viruses.

O+ Blood

A blood type in the ABO blood group system that is Rh positive and can be donated to individuals with any Rh+ blood types.

Anti-rH

A type of antibody directed against the Rh factor on red blood cells, significant in blood transfusion and Rh incompatibility in pregnancy.

Platelets

Small, disc-shaped cell fragments in the blood that are crucial for blood clotting and preventing excessive bleeding following injury.