Which Situation Is an Example of Using Inferential Statistics

Which situation is an example of using inferential statistics

A)  A public poll reports that 75 percent of the population supports picnics. 
B)  The government reports that it must implement a 5 percent cut in spending. 
C)  The national bank reports that consumer debt is significantly higher than last year at this time. 
D)  A teacher indicates that most students scored between 55 and 65 on the test.