The eighteenth century author Jonathan Swift once suggested in a satiric essay Irish farmers could eat their children to address the twin problems of overpopulation and lack of food.

A. Irish farmers could eat their children to address the twin problems of overpopulation and lack of food
B. that the twin problems of overpopulation and lacking food could be addressed by the eating of children by Irish farmers
C. of the twin problems of Irish farmers, overpopulation and a lack of food, could be addressed by the eating of their children
D. that Irish farmers could address the twin problems of overpopulation and lack of food by eating their children
E. that Irish farmers, facing overpopulation and lacking food, could address the twin problems through eating their children.

OA is D

Can an Expert shed more light on why option D is the correct answer? Thanks in anticipation.