list the (4) methods that poisons are able to enter into the body?

Its either c or d. i would go with d though, because im not sure if its legal in all of the us

Cotton with iron probably

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.