In Order to Lose Weight and Reduce Body Fat,a Friend

In order to lose weight and reduce body fat,a friend of yours has decided to eliminate all fat from his diet,while consuming unrestricted amounts of carbohydrates.What do you think of this idea?

A) It is a good idea,because if your friend doesn't eat any fat,he cannot store any additional fat.
B) It is a bad idea,because consumption of fat is required to provide cofactors for the electron transport chain.
C) It is a good idea,because under conditions where ATP levels are low in cells,carbohydrates will be stored,and fat stores will be catabolized via beta-oxidation to generate energy.
D) It is a bad idea,because if ATP levels are high in cells,excess acetyl-CoA from the metabolism of carbohydrates can be used for fatty acid synthesis.