The Cambrian Explosion Provided a Wealth of Fossil Remains for Scientists

The Cambrian Explosion provided a wealth of fossil remains for scientists to uncover. Many of the animals from this time period had tough skins or shells. This would

A) protect the animal from osmotic pressure.
B) be a disadvantage for these organisms and lead to their death and fossil formation.
C) protect the animal from predators.
D) make these animals more desirable to predators.
E) allow the animals to move into different environments easily.