Final answer:
Business professionals can learn about industry trends by reading trade journals, which provide news and analysis relevant to a specific industry. These journals can help professionals stay informed about market developments, competition, and the broader effects of international trade on their sector. The correct option is C.
Step-by-step explanation:
By reading trade journals, business professionals can primarily learn about industry trends. Trade journals are publications that provide specific industry-related news, analysis, and information. They are valuable resources for keeping abreast of new developments, technological advancements, and market dynamics.
Additionally, these journals often discuss impacts from international agreements, contributions to globalization, and the influence of technology on markets.
Business professionals might also be interested in how trade journals discuss the effects of reductions in tariffs, quotas, and trade barriers, as well as the rise in competition from firms offering better or cheaper products, which can drive changes within their industry.
As a firm becomes established, such trade information allows outside investors, like bondholders and shareholders, to better assess the company's potential for profitability without a personal knowledge of its managers.
Hence, Option C is correct.