Between 12 March and 3 April there have been a number of cases of food poisoning at the old people's care home. It has resulted in two deaths, permanent paralysis of one old woman and continued hospitalization of three other residents. The police are treating the cases as suspicious. It is also known that: The residents have all agreed to leave 5% of their estates to the home on their death. The home is privately owned and run by David John. There have been delays of at least 28 hours from the appearance of the initial symptoms in reporting the cases of food poisoning. David John is a member of Alcoholics Anonymous. Janet Scree is the nurse in charge of the residents. David John is a qualified pharmacist. The care home is currently running at a loss. The chef ensures that the standards of hygiene in the kitchen are above the level required by environmental health inspectors. Janet Scree is colour-blind.

Question: Janet Scree may have muddled up the residents' medicines.
Options:
A. true, B. false, C. uncertain
Answer: "A"