The first officer to arrive at the scene needs to focus on identifying anyone injured at the site and take appropriate action to care for their injuries. this may include administering cpr or first aid as well as calling in emergency medical providers. after this is done, what should be the officer's next priority?

a) interviewing witnesses
b) securing the crime scene
c) photographing the crime scene
d) conducting a walk-through examination

B) securing the crime scene

Explanation:

Crime scene is a place where potent evidences related to crime can found. On reaching the scene of crime the first officer should take initiative to provide first aid to the victim or any other injured person so that he can be witnessed upon the events which could have happened in the past. Later on the first officer should secure the scene of crime, so as to avoid any unwanted entry of people who can contaminate the scene of crime as well as may deteriorate the potent evidences which can be used later for proving crime.  

On the basis of the above explanation, B) securing the crime scene. is the correct option.

what's the rest of the question

the fossil record provides evidence of a common ancestor to many species.