The chain of command is an important concept in law enforcement. the chain is organized from to the (1 point)
a: lowest; highest
b: highest; lowest
c: oldest; youngest
d: youngest; oldest

My answer is B. highest to the lowest.
 
In organizations especially in the military, the one who gives the order usually comes from the top position. It is transferred from the next to the highest position and passed until it reaches the lowest in rank. 

Answerbiological perspective