In my opinion with the history scenario I would use text 9 and text 27 as they are similar in the fact that in the past diet had been misinterpreted. For example, text 9 shows the importance of beef and in the past Torode explains that he "couldn't even find a good sausage" or whatever the quote it and people thought beef had all these different diseases and this wasn't accurate. Similarly, text 27 shows how inaccurate Oliver Twist was due to food, the last paragraph has all sorts of rhetorical questions which you can sway towards in your answer. That's my opinion anyway. By the way thanks for the help on structuring, this thread has helped a lot.