Why have transgenic proteins present in crops often been tested in the presence of stomach acid before the plants were released?

A. To see whether the protein will be mutated into a more harmful protein (e.g. prions)

B. To see whether the protein can be digested to provide substantially equivalent nutrients

C. To see whether the protein will be digestible by an average consumer

D. To see whether the protein will persist long enough to cause an allergic reaction

Answer: Option D