Final answer:
The test of the coagulation system that requires a blood tube containing diatomaceous earth is the Activated Clotting Time (ACT). option c is answer
Step-by-step explanation:
The test of the coagulation system that requires a blood tube containing diatomaceous earth is the Activated Clotting Time (ACT).
Diatomaceous earth is a substance that helps to activate the clotting process by promoting the interaction between platelets and clotting factors. It provides a surface for the clotting factors to bind to and initiate the formation of a clot. The ACT test measures the time it takes for blood to clot when mixed with diatomaceous earth. option c is answer