What Was the Controversial Element of the "Pusztai Affair" in Britain

What was the controversial element of the "Pusztai affair" in Britain?

A) Pusztai documented a deadly flood in West Virginia coal country.
B) Pusztai traced an alarming rate of "normal accidents" in nuclear plant functions.
C) Pusztai found that rats fed on GMO potatoes developed shrunken internal organs, had their immune system depressed, and grew more slowly.
D) Pusztai found that the death rates of Mad Cow disease were higher than previously expected.