Final answer:
At absolute zero, the entropy of a highly ordered system is zero.
Step-by-step explanation:
The correct answer is c) Negative entropy.
Entropy is a measure of the disorder or randomness in a system. At absolute zero, which is the lowest possible temperature, the system is in its most ordered state. This means that the entropy of the system is at its minimum and is equal to zero.
As the temperature increases, the entropy of the system also increases, representing a higher level of disorder.