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".

[header] How to identify shark teeth [title] Search for teeth at the tide line and the shoreline. [step] Go to the beach at low tide and look for the line of debris in the sand. Walk slowly along this tide line as you keep your eyes peeled for teeth. <sep> (A) The tooth for sharks that live in sandy waters is also known as the demon tooth and its characteristics are similar to those of sharks. This may be especially significant if you live in dense sand where there will be a lot of boulders and debris. (B) If the beach is busy, you might have more luck looking right where the waves are crashing into the shoreline so that you can snag teeth before others see them. [substeps] Every now and then, dig up some of the sand along the tide line and/or shoreline and search through it for teeth. (C) Once you see teeth appear on this line, you can get a sense of how they look. You can also use a body watch and watch your hands while you examine teeth. (D) [substeps] Fins with ribbons, lobster teeth, or koistriped teeth are more common than human teeth. [title] Look for shark teeth that have saliva on them.
B