A veterinarian is trying to ascertain why a herd of sheep suddenly all have green lips and muzzles and are coughing and vomiting. He believes that they have ingested a biotoxin and asks the owner if he has noted any rubber bitterweed in his fields. The farmer is incredulous, saying, “It’s right in the name—BITTERweed. Sheep don’t eat that stuff.” Which fact would support the veterinarian’s theory that these sheep have eaten the poisonous scrub?

A.
Bitterweed grows in most parts of America.

B.
The weed is actually very sweet and sheep like the taste.

C.
If they have not been fed properly, sheep will eat bitterweed.

D.
Sheep will eat anything that is not tied down.