The best source of data of your current diet is D.) A food journal
Your memory can become mistaken, your friend's opinions may not be valid, and how would the internet know what you ate. These are not reliable sources. If you wrote done what you ate, you can easily refer back to your diet and the benefits it may have had.
Starving yourself will make you lose weight but will also cause bad health. The best diet to lose weight is to drink lots of water and eat fruit. +exercise
