Carlos and Veronica lead very similar lifestyles. They both run every day and eat healthily, but they both have smoked since they were 16. Carlos was diagnosed with lung cancer when he was 48, but Veronica never got cancer. Which most likely explains why Carlos got cancer but Veronica did not?

O Veronica leads a healthier lifestyle than Carlos

O Carlos has a gene for cancer that was triggered

O Veronica has a gene for cancer that Carlos does not

O Carlos leads a healthier lifestyle than Veronica