What is the difference between an activity inventory and an object inventory?

A list can be composed of physical items, people, character traits, ideas, in short, almost anything.

Inventory generally refers to physical items only and involves counting and replenishing an existing stock for a specific purpose. Examples: you have 4 cans of soup in your cabinet, but you need 10, so you list 6; you inventory the furniture in your house for insurance purposes.

The answer is d) all of the above