I think is C,,,,,,,,,,,,,,,,,,,
Answer:
Muhammad's first revelation was an event described in Islamic tradition as taking place in 610 AD, during which the Islamic prophet, Muhammad was visited by the angel Jibrīl, known as Gabriel in English, who revealed to him the beginnings of what would later become the Qur'an.
Adopting a single currency is essential to having a smooth internal economy. When many states trade with different currencies within a closed environment, people who wish to buy products across boundaries have to convert currencies, which usually involves a fee.
The United States developed the hydrogen bomb apex
