The adage, "There is no such thing as a free lunch," means a. even people on welfare have to pay for food. b. the cost of living is always increasing. c. people face tradeoffs.

b. the cost of living is always increasing

Explanation:

It is said that people on welfare are getting free lunches but living on welfare has its own disadvantages that far outweigh the free lunch benefit.

The cost  of living is incredibly high and it is particularly hard when someone is poor, the free lunch comes with tax and other commitments that would not be there if the person would just not be in a welfare scheme and be living off of their own means which they cannot.

The adage "There is no such thing as a free lunch" means people face trade offs.

Option: C

Explanation:

When the member of a society is earning the same amount of money in that case the adage there is no such thing as a free lunch is applicable. Suppose the price you paid for doing something what you did was an opportunity you can no longer enjoy.

In macro economics, economist usually use this phrase to make understand the gradual difficulties in earning where all the employees are earning same amount of salary. It reveals an relationship between decision making and consumption.

two jet streams that directly affect the formation of weather in the continental part are a polar jet and a subtropical jet. they are responsible for the transportation of weather systems, which directly affect people. the polar front is the boundary between cold air from the north pole and warmer equatorial air. both the polar jet and the subtropical jet blow from the west to the east, and follow the boundary between cold and warm air.

the strongest jet streams are polar jets, while subtropical jets are somewhat weaker.

the right answer is c. the polar jet stream is generaly stronger than the subtropical jet stream.