Bill Runs a Restaurant Called 'Meat Lovers

Bill runs a restaurant called 'Meat Lovers'.The following events occur on 27 May 2009.At which point has Bill acted 'unconscionably'?

A) At 6am, he gets into a heated argument with a beef supplier over the price the supplier is charging.
B) At 11am, he tells one of his waitresses that he has to fire her because she is incompetent.
C) At 3pm, when a visually impaired customer asks Bill for the cheapest item on the menu, he recommends the most expensive dish available.
D) At 7pm, he throws a pan of poorly cooked spaghetti at the restaurant's chef, narrowly missing him.