Read the passage.
Next gather the equipment you’ll need: rope, a shovel for digging, sand to line your pond, large rocks or bricks, scissors, and a large plastic sheet. To figure out how large your plastic sheet should be, take the maximum length and width of the pond and add double the depth to each number.
What do you need sand for?
A.to measure the sheet
B.to hold the plastic sheet in place
C.to line the pond
D.to fill the hole