Why are swollen lymph nodes a sign of infection?
O
A. Memory cells are stored in the lymph nodes.
O
B. Infections cause increased lymphocyte production.
O
C. Bacteria and viruses mostly attack the lymph nodes.
O
D. The liver produces more lymph during infections.

d. the weight of the book

there are 35 white marbles

step-by-step explanation:

y- yellow marbles

4y + 5 = 45

subtract 5 from both sides

4y = 40

divide for from both sides

y = 10

plug in 10 to get 40 yellow marbles then subtract by 5 to get 35 marbles

thus there are only 10 yellow marbles

digestion

it excretes wastes