Rats exposed to BPA produce obese offspring, but this effect can be reduced if they eat a diet rich in vitamin B12 (which increases methylation). What does this finding suggest about epigenetic changes?
Group of answer choices

Epigenetic changes are more severe for older, sexually mature animals.

Dietary factors produce the strongest epigenetic changes.

It is possible to counteract or balance epigenetic changes with other epigenetic changes.

Epigenetic changes are unpredictable.