'Thinking about fully automated, 'driverless cars,$\text{'}$ cars that use technology to drive and do not need a human driver, based on what you have heard or read, how soon do you think driverless cars will be commonly used in the $[$United States$]?"$

The figure shows a summary of results of the survey in a histogram indicating the percentage of the total responses in different time intervals.

$($a$)$ Are the responses to the survey question quantitative or categorical?

The responses are categorical since the responses are numerical values.

The responses are categorical since the responses are not numerical values.

The responses are quantitative since the responses are numerical values.

The responses are quantitative since the responses are not numerical values