Answer:
a) an organization hiring a contractor to perform a task it has been doing in house.
Step-by-step explanation:
Sub contracting (outsourcing) is the practice of business giving out a internal task or a function to an to an external contractor to perform in order for the business to concentrate on achieving its core function. It must be noted that the function(s) that are contracted out are those the business organization could do or have doing itself.
These functions are outsourced to enable the business achieve efficiency and get the benefits and value of expertise of the contractor.
It is also known as outsourcing or contract manufacturing