Answer:
option A.
Explanation:
The correct answer is option A.
Earlier Barter system was used as a mode of exchange of goods. But it was difficult to do trade in the barter system So, Coin system was introduced for trading.
The first Coin system was introduced during Indus valley civilization in back 3300 BCE.
The coins were made up of Cowry shells.
1854 may 30th is when the Kansas Nebraska act was passed
Answer:
In elections using electoral systems where strategic nomination is a concern, primaries can be very important in preventing "clone" candidates that split their constituency's vote because of their similarities. Primaries allow political parties to select and unite behind one candidate.
Explanation:
the longest one in history