**Core Concept**
Toll-like receptors (TLRs) are a family of pattern recognition receptors that play a crucial role in the recognition of pathogen-associated molecular patterns (PAMPs) and the activation of the innate immune response. They are responsible for recognizing various bacterial products, such as lipopolysaccharides (LPS), peptidoglycan, and bacterial DNA.

**Why the Correct Answer is Right**
TLRs recognize these bacterial products through their extracellular Toll/Interleukin-1 receptor (TIR) domains, which interact with adapter proteins such as MyD88. This interaction triggers the activation of downstream signaling pathways, including the NF-κB and MAPK pathways, leading to the production of pro-inflammatory cytokines and the activation of immune cells. For example, TLR4 recognizes LPS through its extracellular domain, which is then transmitted to the TIR domain, leading to the activation of the MyD88-dependent signaling pathway.

**Why Each Wrong Option is Incorrect**
* **Option A:** This option is incorrect because it does not specify the mechanism by which TLRs recognize bacterial products. While TLRs do play a role in recognizing bacterial products, the correct answer should include the specific mechanism of recognition.
* **Option B:** This option is incorrect because it does not accurately describe the role of TLRs in stimulating the immune response. While TLRs do stimulate the immune response, the correct answer should include the specific mechanism of activation.

**Clinical Pearl / High-Yield Fact**
TLRs are critical for recognizing bacterial products and activating the innate immune response, but they can also contribute to the development of inflammatory diseases when dysregulated. For example, excessive activation of TLR4 by LPS can lead to septic shock.

**Correct Answer:** C.