Your friends are having a party and will be bringing alcohol. you've decided that you'll either attend, but give them an excuse for not drinking at the party or just not attend. which method do you consider is the most effective refusal? (site 1)

The most effective refusal would be to to say no and walk away

You did not show us the image of the burger, but i shall try to answer as best i can.  when purchasing food, always consider the ingredients as well as the person who prepared it. consider if they were hygienic people or not, in case the burger was infected with bacteria. no mortal should place an infected burger into their mouth.