I think it's A. don't know for sure
Answer:
"Discovered" is past tense
The correct answer is C. Civilizations.
Explanation
Civilization is a term that refers to an advanced state of culture typical of human society that had complex social institutions in government, laws, security, among others. Also, civilizations are defined by job specializations that means certain individuals have knowledge and experiences in specific areas. Additionally, this term is used to designate a complex society characterized by advanced cities with extensive development of various aspects such as science, architecture, arts, technology, among others that allows it to stand out from other contemporary societies. Throughout history, there have been various civilizations around the world that have influenced modern Western society, for example, the Egyptian, Greek, Roman, Chinese, Islamic, Mayan, Inca civilizations, among others. According to the above, the correct answer is C. Civilizations.
Bills and coins that a country actually circulates is called circulation currency. This is money that is used to conduct transactions between consumers and businesses for goods and services. Money that is kept in a bank and in long term investments are not a part of circulation currency because it cannot directly be used for day to day transactions.
