Final answer:
b) Betting on the outcome of a pro football game at a casino in Detroit
In the United States, the legality of gambling activities varies by state, but sports betting is legal in Michigan, so betting at a Detroit casino is legal, as is informal wagering between friends for non-monetary prizes.
Step-by-step explanation:
The legality of specific gambling activities in the United States varies by state. For the options provided:
- Winning money playing poker on the internet: This activity's legality depends on the state you are in, as online gambling laws differ drastically across the United States. Some states have legal online gambling, while others do not.
- Betting on the outcome of a pro football game at a casino in Detroit: Sports betting has been legalized in Michigan, so this type of betting is legal at casinos in Detroit.
- Betting a dinner with your friend based on the outcome: Informal betting between friends, like wagering a dinner, is generally tolerated and not subject to the same sort of regulatory enforcement as organized gambling, making it effectively legal.
Therefore, the correct answer to the question is that both options b (Betting on the outcome of a pro football game at a casino in Detroit) and c (Betting a dinner with your friend based on the outcome) can be considered legal activities in some circumstances in the United States.