All of them are important rules but i would say D because chocolate is fattening and has lots of sugars and eating snack foods is not healthy either.
Is it just only those qoustions
The most common and the most delicious substance are chocolates. Chocolates have plenty of chemical substance that could calm your brain and affects your body. It has Phenylethylamine substance that is actually produced by our brain when we are interested in something or when we are in love with someone. Chocolates are healthy.
Take bath instead of showers hope I helped