Which statement(s) is(are) TRUE? Please note that if there is more than one true statement, there is no partial credit for identifying only one true statement correctly. O a. In Porter's Value Chain framework, Procurement refers to the purchase of raw materials. O b. Capital-intensive services such as airlines and hospitals are grouped under the service category Mass Service in the Service Process Matrix). O c. With reference to the Service plocess Matrix, the degree of labor intensity refers to the ratio of labor cost to capital cost. O d. a and care true. O e. With reference to the Service Process Matrix, Volume refers to the volume of business orders generated from new customers in the previous month