Jamal, a newly appointed options supervisor at a brokerage firm, is overwhelmed with the volume of daily trading activity. He delegates the responsibility of reviewing client accounts for suitability and potential red flags to a junior analyst, Anya, who has limited experience with complex options strategies. Jamal instructs Anya to flag any accounts with unusually high trading volumes or significant losses, but he does not provide her with specific guidelines or training on how to identify potentially unsuitable trading patterns. After several weeks, Anya flags an account belonging to a retired teacher, Ms. Rodriguez, who has been aggressively trading volatile options contracts. However, Jamal, preoccupied with other matters, dismisses Anya\'s concerns without thoroughly investigating the account. He assumes that Ms. Rodriguez understands the risks involved and is making informed decisions. According to regulatory guidelines and industry best practices for options supervision, what critical supervisory responsibility has Jamal most likely failed to fulfill?