It is because adults who have learned about medicines know whats right for you
The answer would be enzyme because vitamin D is a protein enzyme
I think the answer is D (I’m not sure tho)
Efficiency is an attribute of usability that focuses on completing a task using the minimum amount of time and effort.
Effective is an attribute of usability that focuses on properly completing a task by guiding users to perform all parts of a task.
With these definitions, it is safe to say that EFFECTIVE AND EFFICIENCY are the attributes of usability focusing on properly completing a task while using the minimum amount of time and effort.
You only know the limits that you can push yourself to which affects what standards you will exercise to . which determines your personal saftey