Final answer:
Cameron Inc. most likely bought 20% of company shares, providing partial ownership in a corporation. The correct option is d.
Step-by-step explanation:
The question pertains to financial instruments that a company can purchase. Based on historical context and business practices, Cameron Inc. could have bought 20% of company shares, which signifies partial ownership of another company. Stocks and shares are often used interchangeably in the context of equity ownership in a company.
Further explanation connects to the broader understanding of corporations, which sell stocks to raise capital and offer ownership stakes, whereas bonds are issued as a form of debt financing. The question seems to be testing an understanding of basic financial instruments and the equity market in a business context. Hence, d is the correct option.