Final answer:
Survival of cancer can be influenced by treatment and a strong support system.
Step-by-step explanation:
Survival of cancer can be influenced by various factors. In the case of your grandpa, it is likely that a combination of treatment and a strong support system played a role in his survival. Medical treatments such as chemotherapy, radiation therapy, or surgery are commonly used to treat cancer. Additionally, having a strong support system of family, friends, and healthcare professionals can provide emotional support, assistance with treatment decisions, and a positive outlook during the cancer journey.