Answer:
The Schlieffen plan was a plan proposed in 1905 that allowed Germany to fight a successful 2 front war.
Answer:
The lack of orange juice represents scarcity.
Explanation:
This is because scarcity is the lack of product, not the lack of demand. Since there is a limited supply of workers then it is less likely to be produced in large quantities, making it scarce because there is not enough of the product to meet the demand. Furthermore, the grapefruit juice cannot be considered scarce because although there is a low demand, the product's production is not threatened in any way, so there is enough of it to satisfy the demand.
One of the main ways in which travel routes today differ from the trade routes of classical era civilizations is that they're far safer, since people have to worry much less about being robbed and/or injured--this is due mostly to government oversight and policing of the routes in question.<span />
I think the first one is "paper assets" and the second one "derivates". I'm not 100% sure though.