**Core Concept**
Glucose concentration in hepatic cells is tightly regulated through various mechanisms to maintain blood glucose homeostasis. The liver plays a crucial role in glucose metabolism by storing glycogen, releasing glucose into the bloodstream, or storing excess glucose as glycogen. When hepatic glucose concentration decreases, the liver responds by activating specific pathways to restore glucose levels.

**Why the Correct Answer is Right**
When hepatic glucose concentration decreases, the liver responds by activating glycogenolysis, the breakdown of glycogen to glucose, mediated by the enzyme glycogen phosphorylase. This process releases glucose-1-phosphate, which is then converted to glucose-6-phosphate by phosphoglucomutase. Glucose-6-phosphatase, a key enzyme in gluconeogenesis and glycogenolysis, then catalyzes the conversion of glucose-6-phosphate to glucose, releasing it into the bloodstream. Additionally, the liver also activates gluconeogenesis, a metabolic pathway that generates glucose from non-carbohydrate sources such as lactate, glycerol, and glucogenic amino acids.

**Why Each Wrong Option is Incorrect**
* **Option A:** This option is not provided.
* **Option B:** There is no specific information on this option, but it is likely incorrect as the liver's primary response to decreased glucose concentration is glycogenolysis and gluconeogenesis.
* **Option C:** This option is not provided.
* **Option D:** This option is not provided.

**Clinical Pearl / High-Yield Fact**
In cases of hypoglycemia, the liver's rapid response to restore glucose levels is crucial. The key enzymes involved in glycogenolysis and gluconeogenesis, such as glycogen phosphorylase and glucose-6-phosphatase, are sensitive to feedback inhibition by high glucose concentrations, highlighting the importance of tightly regulating glucose levels in the liver.

**Correct Answer:**
(Note: The correct answer options were not provided in the original question. I'll wait for the complete question to provide the correct answer.)