OK so I believe the answer will be B. because they never really give you all the information but they will give you the core info.
Increasing rates of chronic diseases, increasing elderly population
Target heart rate is defined as the minimum number of heartbeats in a given amount of time in order to reach the level of exertion necessary for cardiovascular fitness, specific to a person's age, gender, or physical fitness.
The ideal drug will have a high toxic dose and a low effective dose.
Hope this helps;-;
Pasta and rice can be preserved for a really long time as well as beans if not cooked so i would say the answer is B.