Abigail is preparing a dinner that involves chicken and broccoli. She washes the raw chicken in the sink before sauteing it in a skillet. Then, she makes sure to wash the broccoli before it is chopped and added to the hot pan. After all the ingredients are in the pan, Abigail uses her sink sponge to wipe down her counter. Then, she sets out some green grapes on the counter for her kids to snack on before dinner. One of her children later complains of stomach problems. Which is MOST likely the source of the child’s issues?