The littoral right, is one given to the person that owns a land that borders large lakes and oceans one can navigate. The right allows them to use the water as much as they can insofar as it does not cause harm to the neighbors that live upstream and downstream. When the owner of this property chooses to sell it, the new owner would have this right and the seller would lose the littoral rights.
I think D, because they have to preserve the evidence, so they cannot mess with the body such as cleaning it. They should not be cleaning the body it will erase the evidence.