I think it is B, not sure, Have a nice day!!!!!
An authors use of situational irony builds a foundation of events that lead up to a stark conclusion. Murakami is an excellent example of this, given that through his novels he writes his characters into situations that are clearly antithetical to whatever has been occurring to said character. This can establish a frame of reference for the reader to assume the finale will go the same way, subverting expectations and providing a surprise. classic mystery trope.
A. Studies showing a connection between higher consumption of processed food and health problems
That the death of his father is a natural part of life.
The theme is the message. I always used to think the theme and then you make the me and then you make the message.