The following data set shows a random selection of delivery drivers from a particular pizza establishment. Driver ID Age, years Gender Car Average Time Average Distance, miles 243 18 Male Truck 9 min 36 sec 7.2 108 29 Male Van 9 min 8.1 711 22 Female SUV 11 min 24 sec 7.4 252 17 Female Sports car 6 min 17 sec 6.8 Which of the following variables are quantitative? (2 points) Select one: a. Driver ID, gender, car b. Age only c. Age, average time, and average distance d. Driver ID, average time, and average distance