Chris conducted an experiment to test whether the p53 expression is different between colon cancer and normal issues. He decided to use each...

Chris conducted an experiment to test whether the p53 expression is different between colon cancer and normal issues. He decided to use each participant as his/her own control. He recruited 10 colon cancer patients and measured the p53 expression levels on both normal and cancer for each of the 10 patients. What test should he use to analyze the data? Why?