Answer:
the correct answer is B. John F Kennedy
Scarcity is what forces you to make trade-offs. Suppose you have an economy that produces and consumes 2 products, A and B. In a world without scarcity, you have enough resources (land, machinery, raw materials, manpower) to produce as many of each product as you need/want. However, in a world with scarcity, you have a limited amount of production resources. You can produce, let's say, 10 A products or 10 B products, or a combination of both products with less than 10 products each. For every additional A product you produce (up to the max of 10), you have to produce less B products. This is a trade-off.
It is true if that's what you're asking
It's C. chronological order.
Because Chronological order is the method of development for this and most recipes. Organizing according to time means explaining when things happen, putting earliest steps first.
