Assertive people would have all of these attributed except having respect for others - C.
Although even this answer perhaps couldn't be considered true because assertive people can have a positive attitude and respect towards other people it's just that in their case they respect themselves more and have a more positive view of themselves as well.
Doing a regular body check-up can help doctors diagnose a disease before it poses high risk. Reduces the risk of complication during treatment – once you are diagnosed with a health condition at an early stage, the complexity and risk involved are less when compared to diagnosing at a very late stage.