Data from a Poll of Adults Aged 30 to 40

Data from a poll of adults aged 30 to 40 in a small town led to the following estimates: Approximately 54% of adults aged 30 to 40 want to improve housing conditions and 72% of adults aged 30 to 40 consider the presence of a garage for a car as a very important attribute in a new house. What additional information about the survey would you need in order to decide if it is reasonable to generalize these estimates to the population of adults aged 30 to 40 of this small town?

A) In addition to the information provided, we would like to know if the subjects were randomly selected or not.
B) In addition to the information provided, we would like to know whether or not the subjects were randomly assigned to any experimental groups.
C) In addition to the information provided, we would like to know the total population of the city.
D) In addition to the information provided, we would like to know the number of adults aged 30 to 40.
E) In addition to the information provided, we would like to know the number of adults aged 30 to 40 who have a garage.