Please cite an .edu for a credible source.
The link between diet and cancer is quite mysterious like cancer itself with many research pointing to certain foods and nutrients which causes or help in preventing cancer. Many research done on cancer and diet points to the association between diet and cancer as it is not 100% certain that consuming less or more of a certain food will guarantee protection from cancer.
Some of the foods that cause cancer are
genetically modified foods (GMOs)
soda and carbonated beverages