The Question "How Much Was the Price Per Gallon of Gasoline

The question "How much was the price per gallon of gasoline when you last purchased it at a full-service service station?" should be avoided because it

A) is beyond the respondent's ability or experience.
B) uses a specific example to represent a general case.
C) asks respondents for specifics when only generalities are likely to be remembered.
D) is a double barreled question.
E) There is nothing wrong with the question.