Answer:
The correct option is D.
Step-by-step explanation:
It is given that an archaeologist discovered two artifacts buried beneath the ground.
Elevation of first artifact = 
Elevation of second artifact = 
We need to find the distance between these two elevations.
Distance = Elevation of first artifact - Elevation of second artifact



On further simplification we get



Distance can not be negative. So, find the absolute value.


Therefore, the correct option is D.