The primary advantage radio has that is not available in the other mass media outlets is:

Question

Quizplus · Accepted Answer

Radio has the advantage of being a more intimate medium since it is usually listened to individually or in small groups such as in a car. This allows for a more personal and engaging communication with the audience which cannot be replicated by other mass media outlets. Though it also has a low cost per contact compared to other mediums, long exposure duration and targeted market segmentation are not unique advantages of radio.

The Primary Advantage Radio Has That Is Not Available in the Other