A student has been feeling sick over the last few days and notices a small swollen mass on the side of her neck. Which of the following would correctly describe why this mass could be a response of the lymphatic system?

A) Infections increase lymph production, causing lymph vessels to swell.

B) Infections increase lymph flow rate, causing lymph vessels to swell.

C) Infections cause lymph nodes to swell because the lymphocytes they house divide.

D) Infections cause lymph nodes to swell because the lymphocytes they house grow in size.