Why do interest inventories compare your interests with the interests of others?

The answer is C: to match you with a career that someone with your same interests enjoys

People with similar interest have a high chance of having similar personalities. Interest inventories compare a person’s current interest with those of people in other occupations. This is done for the sole purpose of determining the preferred occupation for the individual. An example is a person taking the strong-Campbell interest inventory. He or she would receive a report comparing his or her interests to those already working in field like engineering, management, and accounting.  

to add important words to get a better understanding

Explanation: