Isaac is trying to decide how often shark attacks happen. he quickly remembers the many shows about shark attacks that he saw on television last week, so he decides that they must be common. isaac's overestimation of the rate of shark attacks is an example of

Social Intuition

According to social intuition, judgements and reasoning are primarily intuitive and are only rationalized later on after the fact. In this case, the overestimation of the danger of shark attacks results from that intuition. Social intuition is both automatic and unconscious.  

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.