Answer: B. a variety of companies
Step-by-step explanation:
Investors minimize risk by investing money in a variety of companies. The reason for this is to minimize risk. Investing in one specific company isn't ideal because in the case of the company running at a loss, the investor loses all his or her money as well.
On the other hand, when the investor invest in different companies, the risk is minimized. When one company isn't doing well, others will probably be doing well.