In the fluid connective tissue the least solid ground substance is found in blood. Blood is one of the four main connective tissue which transports various materials from one place to another.
It is a fluid containing salts, nutrients and dissolved proteins. The watery fluid carrying oxygen from heart to the vital organs and then carrying carbon dioxide from vital organs to the heart.
The fundamental substance is part of the extracellular matrix and comprises a set of proteins on which mineral salts are fixed to form the connective tissue. They are always attached to the fibers (collagen, elastin, reticulin). The fundamental substance of the blood is going to be found in the blood plasma, being therefore the least solid.
C) Check the outside of the body for injuries, tattoos, marks, look for identification
Explanation:
I don't have experience in forensics so my answer is mostly based off common sense. You'd want to check the outside of the body before cutting and looking in the insides of a body.