Multi-select problem: How does the next paragraph end?

How to build a dry well
Dig a 12-inch (30. 5 cm) deep trench from the area of standing water to the location of the dry well holding tank.
The trench should begin at ground level and gradually angle down to a 10 percent grade at the holding tank.
Enlarge the soil drainage test pit to fit the holding container.

A). Drill a 1.5 pound (47.6 ml) hole around the perimeter of the proposed trench. Add coarse sand to the area to use as a well.
B). The lip of the container should be 8 inches (20. 3 cm) below the surface after 2 inches (5 cm) of gravel is added to the bottom of the pit.
C). Dig in the pit, and pack it tightly around the water area, making sure not to cover the trench. If possible dig at a non-slip ground base, often referred to as a compost pile.
D). The plumbing tools needed can cost between $215 and $40, but are foolproof and reliable for keeping the water up and running consistently. Excavate the soggy areas to a clay base in a well well ready for dry conditions.
B).