Which of these statements about particulate matter less than 2.5 microns in diameter is true? A.) They can cause heart and lung disease B.) They're produced by nitrogen gas (N2). C.) They're less of a threat than particulate matter that's 10 microns in diameter. D.) They're the size of a human hair

Which statement best describes lymph? a. a clear fluid that carries proteins, water, white blood cells, fat, dead cells, and toxins that drain from the fluid between the cells of the body b. a clear fluid in the cells that to secrete and transport hormones from one region of the body to another c. a thick, opaque, and yellowish fluid that is present when there is an infection in the body d. a clear, liquid component of blood that contains red blood cells, white blood cells, platelets, and iron