**Core Concept**
Glycolysis is a metabolic pathway that converts glucose into pyruvate, producing a net gain of 2 ATP and 2 NADH molecules. The pyruvate produced in glycolysis can be further metabolized in the mitochondria through the citric acid cycle, generating more ATP, NADH, and FADH2.

**Why the Correct Answer is Right**
The correct answer involves the transport of reducing equivalents, specifically NADH, from the cytosol to the mitochondria. This is achieved through the action of the malate-aspartate shuttle, also known as the malate shuttle. The malate shuttle is a mechanism that allows electrons from NADH to be transferred to the mitochondrial electron transport chain, enabling the production of ATP. This process involves the conversion of oxaloacetate to malate in the cytosol, which is then transported into the mitochondria and converted back to oxaloacetate, reducing NAD+ to NADH.

**Why Each Wrong Option is Incorrect**
**Option A:** This option is likely incorrect because it does not accurately describe the primary mechanism for transporting reducing equivalents from the cytosol to the mitochondria.

**Option B:** This option may refer to a different transport mechanism, but it is not the primary method used for transporting reducing equivalents from glycolysis.

**Option C:** This option is incorrect because it does not accurately describe the malate shuttle or the primary mechanism for transporting reducing equivalents.

**Clinical Pearl / High-Yield Fact**
The malate shuttle is an essential mechanism for transporting reducing equivalents from glycolysis to the mitochondria, enabling the production of ATP through the citric acid cycle.

**Correct Answer:** C. The malate shuttle is the primary mechanism for transporting reducing equivalents from the cytosol to the mitochondria.