A(n) is a series of related jobs built on a foundation of interest, knowledge, training, and experience. a. occupation b. trade c. career d. skill set

It is a career. There are many ways to define the term. Career means progress through life. Therefore, it is related to person's life, learning and work. We can also define career as a job that involves special training and education. In this sense, it can be seen as sequence of related jobs inside an industry or sector, such as "career in education", "career in engineering". Combining these two different definitions we can observe that the correct answer is C.

caliban is prospero's slave in the shakespear's play "the tempest"