The answer is: B. Skills needed to perform a certain kind of job.
Content skills can be obtained after a certain worker analyze the things that that worker need to has in order to make his/her job easier and start to seek proper training/learning to obtain it.
Every jobs would require different set of content skills.
For example, as a sales associate, your content skills would include things such as: public speaking ability, ability to form a relationship with others within small time window, etc.
As an accountant, your content skills would include things such as: Attention to details, deep knowledge in finance-related laws, high computing ability, etc.
