Generally, companies hire other company to do some or all of the functions necessary to run their businesses. This is known as:

A) outsourcing.
B) exporting.
C) job developing.
D) hiring.

The act of hiring another company to perform certain business functions is commonly known as outsourcing. It is a common business strategy that allows organizations to focus on their core competencies while saving costs and increasing efficiency in non-core areas. Option B (exporting) refers to the act of sending goods or services to another country, option C (job developing) is not a common term used in business, and option D (hiring) is too general and does not specify the delegation of business functions to another company.