Final answer:
During the Gilded Age, a benefit of laissez-faire government was that individuals like J.P. Morgan could freely invest their money in industries without government restrictions.
Step-by-step explanation:
The benefit of laissez-faire government during the Gilded Age can be seen in option C) J.P. Morgan investing his money in Carnegie Steel without any government restrictions. Laissez-faire government policy allowed individuals like Morgan to freely invest in industries without government interference or regulations. This enabled entrepreneurs to make business decisions and investments based on their own judgement, leading to economic growth and development.