What was Tommy Cheung's stance on migratory birds in 2005?

A. He advocated for their protection due to their role in pollination
B. He thought they were a minor contributor to the bird flu pandemic threat and required no action
C. He was an outspoken opponent of migratory birds, blaming them for the bird flu pandemic threat
D. He believed they were a vital part of the ecosystem and should be preserved
Answer: 