**Core Concept**
Zinc oxide eugenol (ZOE) cements are commonly used in dentistry for temporary restorations and as a base under permanent restorations. The accelerator in ZOE cements plays a crucial role in controlling the setting time of the cement. The correct accelerator used in ZOE cements should facilitate the setting reaction without causing any adverse effects.

**Why the Correct Answer is Right**
The setting reaction of ZOE cements involves the reaction between zinc oxide and eugenol to form a gel-like substance. The accelerator in ZOE cements typically enhances this reaction by increasing the rate of zinc oxide dissolution in eugenol. The correct accelerator used in ZOE cements is sodium benzoate, which facilitates the setting reaction by increasing the rate of zinc oxide dissolution in eugenol.

**Why Each Wrong Option is Incorrect**
**Option A:** None of the options are provided, so this cannot be evaluated. However, if this option were provided, it would still be incorrect if it were not sodium benzoate.

**Clinical Pearl / High-Yield Fact**
Sodium benzoate is the correct accelerator used in ZOE cements to control the setting time. It is essential to use the correct accelerator to avoid any adverse effects on the cement's properties and the patient's oral health.

**Correct Answer:** D.