Day 180 : Cenote Originally uploaded by Jess and Colin Cenotes are caves that formed in collapses in the limestone plateau that is the Yucatan and then filled up with water . Some of them are part of the world 's longest underwater cave system . ( Probably more of them than we can verify , because many of the passages are too small for people or remote cameras to traverse ) .
According to the above context, choose the best option to answer the following question.
Question: What may be the reason these pictures are being uploaded ?
Options:
A. We are uploading the pictures in case something happens to originals .
B. We want people to see how large the passages are in the underwater cave .
C. We are sharing the pictures we took on our extended research trip .
D. We are posting the picture as a part of a photographic journey competition .


C