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

Hughes and other investigators from the FDA began tracking the cow's parts through Washington, Oregon, and Idaho. For 32 days, they drove along icy roads in the middle of the night. They logged thousands of miles and battled fierce snowstorms. They slept in little motels and ate at truck stops. Some trudged through muddy farms and feed mills. Others picked through carcasses in slaughterhouses. Some pulled bad burgers from grocery store shelves. At night, they talked on the phone and compared the day's results.

The writer could best revise the passage to make it stronger by

adding a claim about the dangers of travel.
adding a thesis to introduce the topic of cows.
adding a quotation from Hughes about the events.
adding a summary of the details using different words.