Don knows that drinking too much liquor is a costly habit that is bad for his health, but he continues to drink large amounts of liquor. he also thinks he is a smart person that makes good choices. don feels some psychological discomfort from this contradiction, which is also called:

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.