Please choose the correct ending to complete the given sentence: Health: [header] How to prevent hantavirus pulmonary syndrome (hps ) [title] Recognize signs of an infestation. [step] Look for small pellets of rodent droppings about ¼-½ " (0.5-1.0 cm) in size. You may also see signs of gnawing on your furniture or rodent tracks in dusty spaces.

Ending1: You may also smell rodent droppings. [substeps] Redness around your pet's eyes, mouth and ears, especially around their front legs, may indicate an infestation. Ending2: The droppings may be black or brown. You may also see patchy or powdery white droppings. Ending3: If you find small wads of soft materials or paper, you may have found rodent nests. You might even smell rodent urine or be able to hear them scurrying around. Ending4: These will often come up from behind mounted electrical appliances or behind ceiling fans. Look for droppings that can be identified.

Answer format: ending1/ending2/ending3/ending4