Which of These Septic Tanks Is Most Likely to Spread

Multiple Choice

Which of these septic tanks is most likely to spread contaminated groundwater far away from the septic tank,and why?

A) the left septic tank because it is higher in elevation
B) the right septic tank because it is lower in elevation
C) the left septic tank because it is in sand
D) the right septic tank because it is in limestone with caverns