Which of the Following Studies Would Provide the Most Reliable

Multiple Choice

Which of the following studies would provide the most reliable evidence to understand the mechanism of spread of H5N1 virus from Asia to North America?

A) Perform anal or saliva smears of migrating waterfowl to monitor whether any infected birds show up in Alaska.
B) Test fecal samples for H5N1 in Asian waterfowl that live near domestic poultry farms in Asia.
C) Test for the presence of H5N1 in poultry used for human consumption worldwide.
D) Locate and destroy birds infected with H5N1 in Asian open-air poultry markets.