Answer:
c. outsourcing
Explanation:
Outsourcing -
It refers to the process of hiring another company , which is responsible for some external project or task , is referred to as outsourcing .
It can be a short term process of hiring , it may also require transferring the employees to another firm internally .
Hence , from the given scenario of the question ,
Hiring the packaging firm by another company , showcases the method of outsourcing .
