GMAT Critical Reasoning (CR) | Human exposure to even low levels of nuclear radiation

Human exposure to even low levels of nuclear radiation dramatically increases the likelihood of contracting some form of cancer. According to a research study involving a town near a former nuclear testing site, no person who resided in the tow during the testing - which occurred more than sixty years ago - andwho was under the age of 10 during the testing lived beyond 50 years of age . However,some of the town's former residents who are now over 50 years old are cancer survivors but resided