Read the following context and choose the best option to answer the question.
Context: These were taken last Monday at the beach . No , they were not trying to build a sand castle . They were digging for their own tidal pool since the little man did n't want to get in the water alone and his parents were afraid of the water They spent a good half hour digging two holes . The first was too far from the water and the second got dumped with sand by the coming waves .
Question: What is the reason you 'd want to dig tidal pools ?
Options: 
A. None of the above choices .
B. Sea life lives or is trapped there and you can watch it .
C. You can get free water
D. You can get fish to eat .


B