18 is D - it's the seller's responsibility to ensure that the person purchasing the spray can isn't underage. If you have a look at part 8B of the graffiti control act 2008, it states "A person under the age of 18 years who is in possession of a spray paint can in a public place is guilty of an...
Does it matter why he left... Didn't the question only specify "what these lines reveal...", which ended at "no indecision or unease between them"? So you would had have to have kept your analysis pertaining only to the specified lines, no?