Final answer:
The statement about the illegality of all gambling contracts in the United States is false because gambling laws vary by state, and there are legal forms of gambling in many jurisdictions. The correct option is b.
Step-by-step explanation:
The statement that all gambling contracts in the United States are illegal is false. Gambling laws vary by state, and while some forms of gambling may be illegal under certain jurisdictions, others are legally sanctioned and regulated.
For example, many states have lotteries, casinos, and permit betting on horse racing. Additionally, Native American reservations have specific rights to host gambling operations based on the Indian Gaming Regulatory Act.
However, it is important to note that certain federal laws, like the Illegal Gambling Business Act and the Unlawful Internet Gambling Enforcement Act, do prohibit some types of gambling activities. The correct option is b.