Answer:
B. support
Step-by-step explanation:
In value chain model, support activities refer to the type of business activities that does not directly involved with the consumers or the main operations. But, it is extremely important for the success of the business. This include things such as human resource management, increasing the quality of technology, etc)
The large portion of employees that the company recruit, trains, and hire wouldn't directly meet the customers. (such as accountants or warehouse workers) .But, their work is really important to ensure that the main operation can run smoothly.