Question

review the details below. moderate exercise boosts the immune system and can reduce the risk of colds by a third. frequently hand washing with warm water and soap is the best way to get rid of germs and prevent illnesses. used sponges and rags should be replaced regularly to avoid spreading harmful bacteria. choose the best topic sentence to introduce a paragraph containing these details. simple steps can reduce the likelihood of spreading or catching an infectious illness. the best way to prevent illnesses is to maintain a healthy immune system. it is possible to reduce the risk of colds and flus by washing your hands and working out several times a week.

Explanation:

The supporting details cover multiple simple actions (moderate exercise, handwashing, replacing sponges/rags) that all help avoid catching or spreading infectious illnesses. The first option encompasses all these steps, while the second only focuses on immune health (missing handwashing/cleaning tools) and the third only covers handwashing and exercise (missing sponge/rag replacement).

Answer:

Simple steps can reduce the likelihood of spreading or catching an infectious illness.