Final answer:
The most logical conclusion is that there were no soft-bodied organisms at this time and location.
Step-by-step explanation:
The most logical conclusion for finding a new fossil deposit containing many species with shells but no soft-bodied species is option B: There were no soft-bodied organisms at this time and location. Soft tissue is hard to preserve as fossils because it needs to be buried rapidly in an oxygen-free, low-energy sedimentary environment. Since these conditions are uncommon, the preservation of soft tissue rarely happens. Instead, typical examples of fossils are skeletal material that has been preserved with little or no change.