Answer: C
. They should map out a grid to systematically look for evidence.
Explanation:
As a crime has been committed, the investigators do not need a search warrant so there is no need to ask a Judge for one so option A is incorrect. 
It is best if evidence is searched for in different locations not just the primary scene so option B is incorrect. 
Setting up a grip to enable the systematic analysis of evidence is their most likely course of action so option C is correct. 
Even if the case is not complicated, evidence still needs to be searched for so option D is wrong. 
 
        
             
        
        
        
Nitrogen,<span>The atmosphere is composed of ~78% nitrogen and ~21% oxygen, with small amounts of other gases. The bulk composition of the earth by weight is mostly, iron, oxygen, silicon and magnesium, in that order, with all the other elements making up only about 5% of the earth's weight.</span>
        
             
        
        
        
Answer:
the termination of an organism or of a group of organisms, usually a species. it occurs when the last individual of a plant or animal species dies out or due to human activity, such as over hunting or through habitat destruction.
Explanation:
this should break it down clear enough