Specialization:
a. leads to greater self-sufficiency.
b. can lead to an increase in overall production.
c. allows workers to develop skills by working on a large number of tasks
d. is always the result of an inefficient use of resources

Option B

Explanation: In simple words, specialization refers to being focused and expert in performing a specific activity. An individual or firm having specialization in their business operations could produce more of their goods or services in the limited resources.

The specialization in one department or activity benefits the whole organisation. For example - If the marketing department have specialization in their activities then the production department and sales department both will more more efficiently due to higher work load.

Hence from the above we can conclude that the correct option is B.

answer; advertising;