Jenny Is a 13-Year-Old Who Follows a Vegan Diet

Jenny is a 13-year-old who follows a vegan diet. She has not been performing as well as her non-vegetarian study friend on math tests. The teacher tells Jenny's mom that she does not appear focused during lessons and can't seem to concentrate on her schoolwork. Which of the following may provide a likely explanation?

A) The diet doesn't provide enough energy for her to stay alert.
B) The diet provides insufficient bioavailable iron and she many be anemic.
C) The diet contains insufficient calcium and protein, which impairs intellectual performance.
D) The high fibre content of a vegan diet that promotes stool formation increases the urge to evacuate, which interferes with her ability to concentrate.