What consequence can a seller face for not verifying a buyer's ID?

Answer: B — Severe penalties including fines

Failure to verify a buyer's ID can lead to severe penalties including fines, which is why this answer is correct. In the context of the marijuana industry, it is crucial for sellers to confirm the identity and age of their customers to comply with the laws enacted by the OLCC. Selling marijuana to someone who is underage or without proper identification is a serious violation of regulations designed to ensure the safety and legality of cannabis sales. The imposition of substantial fines serves as a deterrent to prevent illicit sales and to promote responsible business practices within the industry. The regulatory framework is designed not just to punish but to encourage compliance through education and enforcement of these critical laws.