Answer:
Judaism.
Explanation:
the the Star of David is a symbol of Judaism.
This would be a perfect example of the system of barter as you are trading one book for the other. You can see from here what barter is, a trading system which involves direct exchange of goods without some kind of medium of exchange, for example money. Services can also be traded this way.
Answer:
A (Sorry, again!)
Explanation:
This one is confusing, but I believe B,C, is wrong. I'm not sure, but those answers don't really make any sense expect for A, D. But, since the question said GDP. GDP can be calculated by adding up all of the money spent by consumers, businesses, and government in a given period. Which is talking about money and the marketing in government. So, it's A most likely. Sorry, if I didn't answer it fully.
He/she will say that both glasses held the same amount of liquid. By the concrete operational stage, the child has developed the ability to understand conservation, and knows that just because the shape or appearance changed doesn't mean the quantity of liquid changed.