Today I was feeling better . But my stomach is still a bit twitchy . Breakfast : Oatmeal and coffee . Snack : Handful of trail mix . More coffee at work . Lunch : Various lunch meats , 2 cheese sticks , several Triscuits . My yogurt and some Weight Watcher granola . Snack : I had fruit left over from lunch that I was too full for at the time .
According to the above context, choose the best option to answer the following question.
Question: What may be the reason for their upset stomach ?
Options:
- They had gotten a sudden illness .
 - They are adjusting to their new diet .
 - None of the above choices .
 - They had fallen ill lately .


They are adjusting to their new diet .