Management at a home improvement store randomly selected 7575 customers and observed their shopping habits. They recorded the number of items each of the customers purchased as well as the total time the customers spent in the store. Identify the types of variables recorded by the managers of the home improvement store. A. number of items-continuous; total time-continuous B. number of items-continuous; total time-discrete C. number of items-discrete; total time-discrete D. number of items-discrete; total time-continuous