Could you rephrase you question to create a clearer understanding .
The most important characteristic of a good detective is if they are observational or not, they won't every solve any case if they don't keep their eyes wide open, and observe.
Answer:
Explanation:
Defo not D as there are too many short sentences.
Defo not A because it is only 2 extended sentences.
Probably either C or B. Whichever one you think seems better, try to narrow it down.