A patient presents with swollen, tender lymph nodes near an infected wound. How should the nurse interpret the role of these lymph nodes in the immune response?

They primarily produce lymph fluid to transport nutrients and waste products away from the infection site.

They store excess fluid from the bloodstream to prevent swelling in the infected tissue.

They regulate blood pressure around the infected area by constricting blood vessels,

They are filtering lymph fluid, trapping pathogens, and activating immune cells to fight the infection