Definition: In this task, you are given a context and four options. Each option is a suggested ending for the context. You should read the context and pick the best ending for the context. Please answer with "A", "B", "C", and "D".
Input: [header] How to seal a driveway [title] Measure your driveway to determine how much sealant to purchase. [substeps] The sealant usually comes in 5 gallon (18. 927 liters) containers, which can cover as much as 400 square feet (121.92 meters). [title] Buy your materials. <sep> (A) [step] If your driveway is your own, you'll need to begin with resin or polyurethane. Open a can of sealant and coat the sides and top with a layer of resin or polyurethane. (B) [step] You will need the sealant, a crack filler, a push broom and a trowel. These items can be found at hardware and home improvement stores. (C) [step] You'll need a while to finish marking your driveway so you don't run out of sealant and other materials. For concrete, wrap masking tape around a block of wood and apply a coat of clear sealant to your home's concrete. (D) [step] You will need a 6 foot (2.1 meter) and 6 foot x 6 foot (1.2 meter) sealant. Hardware stores and supermarket stores usually sell pre-sprayed sealants.
Output:
B