**Core Concept**
Glucocorticoids are a class of steroid hormones that play a crucial role in modulating the inflammatory response. They exert their anti-inflammatory effects primarily through the transcriptional regulation of genes involved in the immune response.

**Why the Correct Answer is Right**
Glucocorticoids act by inducing the expression of anti-inflammatory genes, such as lipocortin, which inhibits phospholipase A2, a key enzyme in the production of pro-inflammatory eicosanoids. Additionally, glucocorticoids downregulate the expression of pro-inflammatory cytokines, such as TNF-α and IL-1β, and upregulate the expression of anti-inflammatory cytokines, such as IL-10. This leads to a reduction in the production of pro-inflammatory mediators and a decrease in the recruitment and activation of immune cells to the site of inflammation.

**Why Each Wrong Option is Incorrect**
**Option A:** This option is incorrect because glucocorticoids do not primarily act by inhibiting the production of pro-inflammatory cytokines. While they do downregulate the expression of pro-inflammatory cytokines, this is not their main mechanism of action.
**Option B:** This option is incorrect because glucocorticoids do not primarily act by increasing the production of anti-inflammatory cytokines. While they do upregulate the expression of anti-inflammatory cytokines, this is not their main mechanism of action.
**Option C:** This option is incorrect because glucocorticoids do not primarily act by stimulating the production of lipocortin. While lipocortin is an important anti-inflammatory protein that is induced by glucocorticoids, this is not their main mechanism of action.

**Clinical Pearl / High-Yield Fact**
Glucocorticoids are often used as a "bridge" therapy in the treatment of acute asthma exacerbations, as they can rapidly reduce airway inflammation and improve lung function.

**Correct Answer:** C.