David's boss has observed that David took about 12 hours to perform tasks A, B, and C. However, he took 24 hours to complete task D. David's boss concluded that task D must have been tougher than the other tasks. Which of the following attributional information led David's boss to this conclusion?

A) low consensus
B) high consensus
C) high distinctiveness
D) low distinctiveness

High distinctiveness

Explanation:

High distinctiveness is basically about to engage in a specific behavior that is unusual and uncommon for a particular person. There is a judgment about whether the person is high in distinctiveness which is uncommon or low for that common for an individual that depends on their past behavior. This type of knowledge related to behavior is called distinctiveness information.  

Thus here David's boss has observed that David has taken 12 hours to perform a task. and take 24 hours to complete the task. So there is distinctiveness attribution style is used by David.  

because this was the year that the state of israel was formed