Which of the following sentences from the article helps prove the claim that living with farm animals can help prevent asthma? A. Now, their old-fashioned ways are helping scientists learn more about the origins of asthma, a condition that sometimes makes it
difficult to breathe.
B. To understand the reasons for this difference, researchers studied 30 Amish children between the ages of 7 and 14
C. Like the Amish, the Hutterites live in farming communities that limit the use of modern technology like computers and televisions
D. The rich microbes in the Amish dust protected the animals airways, preventing a response.