The following elements are included as support activities of a value chain:

1. Firm infrastructure 2. Human resource management 3. Inbound logistics 4. Procurement 5. Marketing and sales

Select one:

a. 1 and 2

b. 2, 3, and 4

c. 1, 2, and 4

d. 1, 2, 3, and 5

e. All of the above