Syndrome Z, a degenerative bone disease, is most commonly found in cows raised in Country A. Recently, it was theorized that the syndrome was caused by those cows’ exposure to pesticides that are only used in Country A, since few of the cows in Country B tested positive for the syndrome. However, this fact does not indicate that the pesticides are responsible for the syndrome because___________.

Compare now A and D

A) it was discovered that horses can also develop Syndrome Z

Totally out of scope. We do not care about horses but cows

D) Syndrome Z only shows signs after about 3 years, and most of the cows in Country B are slaughtered for meat within the first 3 years of their lives

This support at the best our conclusion

However, this fact does not indicate that the pesticides are responsible for the syndrome because[/size]___________.

because IF we butcher BEFORE three years of living the cows of country B these will not show, of course, any symptoms

Regards