I believe it is C. because it's showing you the tasty item, and promoting the tastiness, if that makes sense
<span>The option which is the least important to consider before choosing a fitness activity is B. the popularity of the activity. It doesn't really matter whether an activity is popular and if a lot of people are doing it, you should do whatever you want to do. So, your personal interest, the cost, and time commitment are things you need to consider before opting for an activity, and you don't have to think about its popularity really.</span>
A) the exchange of gases throughout the body