Final answer:
Violations of the Telemarketing Sales Rule lead to formal negative sanctions, which include both legal consequences and financial penalties, confirming that both a and b are correct.
Step-by-step explanation:
Violations of the Telemarketing Sales Rule may result in both legal consequences and financial penalties. This means the correct answer to the question is (c) Both a and b. When a telemarketer violates this rule, they are subject to formal negative sanctions which could include fines, injunctions, and potentially other legal actions including criminal charges in severe cases. These sanctions serve to uphold consumer protection laws and maintain ethical standards in business practices.