Answer:
the answer is "D" Although "A" seems to be the favored method
Answer:
B) People face trade-offs
Explanation:
A trade-off happens when you have to balance two (or three in this case) opposing situations. In economics all resources are scarce, and time is the only resource that everyone shares equally. Bob is facing opportunity costs, i.e. if he chooses to train one activity he cannot train the other.
Bob has to decide how to divide the time he can spend training. If he chooses running, he can´t swim or ride a bike. So he has to balance the time spent on each activity, probably depending on which sport he needs to train the most.
<span>Money is anything that people are willing to accept to use for payment for goods and services.The purpose of money can be described as follows:
</span>store of value - money is a way of saving for future purchases
unit of account - money <span>represents the real value (or cost) of any economic item.</span><span>
medium of exchange- </span>Money serves as a medium of exchange.