Final answer:
C. 19 years
In Ontario, the legal age to consume alcoholic beverages under the Liquor License Act is 19 years.
Step-by-step explanation:
Under the Liquor License Act in Ontario, a person can legally consume an alcoholic beverage at the age of 19 years. This is in contrast to the National Minimum Drinking Age Act of 1984, which required states in the U.S. to raise their drinking age to 21 years or face a reduction in federal highway funds. The earlier Eighteenth Amendment and the Volstead Act, which had established Prohibition, were repealed by the Twenty-First Amendment, thus leaving authority to regulate alcohol with the states, leading to differences in legal drinking ages across North America. It's important to note that laws regarding alcohol consumption can vary significantly from one jurisdiction to another.