Read the passage from When Birds Get Flu and Cows Go Mad! by John DiConsiglio. Hughes was assigned to find infected cow parts at meat processing plants in Washington. He remembers the sad look on some

Read the passage from When Birds Get Flu and Cows Go Mad! by John DiConsiglio.

Hughes was assigned to find infected cow parts at meat processing plants in Washington. He remembers the sad look on some owners’ faces when he flashed his badge. If there was a chance that any of their meat might have mad cow, they’d have to throw it all away.

Which best explains why the author used a signal word in the passage?

to signal the tone 

to signal a problem

to signal a solution

to signal a resolution