Which of the following are signs of fluid distribution during embalming?

Fluid distribution during embalming refers to how the embalming fluid moves through the body tissues. A large volume of blood drainage is a clear indicator that the embalming fluid is being properly distributed throughout the vascular system. When blood is drained effectively, it often signifies that the arterial injection is successful and that the embalming fluid is reaching the tissues where it is intended.

The other options do not directly indicate fluid distribution. Increased blood viscosity may suggest challenges with circulation but does not provide a direct sign of how well the embalming fluid is being distributed. Diminished skin elasticity might signify tissue changes over time but does not specifically indicate the flow of embalming fluid. Necrosis in the extremities could point to poor circulation but is not a direct representation of fluid distribution during the embalming process. Thus, observing a large volume of blood drainage is the most relevant sign indicating that the embalming fluid is being effectively distributed within the body.