Shannon feels miserable in her marriage but refuses to consider getting a divorce; she feels that a divorce would completely waste all of the hard work she has put into making the marriage work for 20 years. Shannon's line of reasoning best illustrates the:

sunk-cost fallacy                      

Explanation:

Sunk-cost fallacy: In psychology, the term "sunk-cost fallacy" is described as a phenomenon that an individual commits when he or she tends to continue a specific behavior or else endeavour as a consequence of formerly invested different resources including effort, time, or money.

Example: A individual buys a movie ticket or a cloth which is non-refundable.

In the question above, Shannon's line of reasoning best illustrates the "sunk-cost fallacy.

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.

answer; being clearly political;