Barter system- A method of exchange when no money is involved.
B and C can't be the answers because they are not exchanging anything.
D can't be the answer either because there is money involved.
So your answer is A) You trade an apple for a banana at school. because you are exchanging something with someone for something else thats not money.
Hope this Helps!!
Some Native American tribes thought by making a partnership with the settlers that they would be able to trade goods with the settlers and bring peace among the colonists and themselves. A short time of peace was brought among them, before fighting broke out.
He wanted numerous tings. He wanted the vast territory, he wanted the resources that the country had such as oil and natural gas, he wanted to be the first to attack before Stalin attacked him, and numerous others.