The answer would be D. Dermatologists
Research indeed suggests that people who're keeping food records are also those who will be more effective in different weight loss strategies - b.
Losing weight strategically through the help of keeping a food record also makes it more probable that you will lose weight.
Healthy activities with partner, doing more things actively, more or less spending more time together, financial aid is also important.
An important part of developing motivation includes understand that motivation is influenced by your ability