all 3 work but studies prove that no carbs is the best and fastest way to lose. your dads diet sounds tempting cuz u can eat all the fav foods but believe me, it will lead to deprivation and bingeing. for example, "i will just have 1 cookie". 1 leads to 10. 10 leads to "what the heck, i will just eat it all and diet later". your mum's diet MAY work but only if you exercise LOTS to work of the carbs. if you need anymore help, luv_candy88@hotmail.com