Jenny Is a 13-Year-Old Hare Krishna Who Follows a Vegan

Jenny is a 13-year-old Hare Krishna who follows a vegan diet due to religious beliefs.She has not been performing as well as her non-vegetarian study friend on math tests and has been very upset about it.The teacher reports to Jenny's mom that she does not appear focused during lessons and can't seem to concentrate on her school work.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 fiber content of a vegan diet that promotes stool formation increases the urge to evacuate,which interferes with her ability to concentrate