**Core Concept**
Boucher's method of relining is a technique used in removable partial denture fabrication, specifically for creating a new denture base that closely adapts to the existing tissue conditions. This method involves the use of a border seal material to create a precise impression of the oral cavity.

**Why the Correct Answer is Right**
Boucher's method of relining is a technique that helps to accurately capture the tissue contours and ensures a precise fit of the denture base. This is achieved by using a border seal material, which is a type of impression material that flows into the border areas of the denture and hardens to create a precise impression. This method is particularly useful for patients who have experienced significant tissue changes since the initial denture fabrication.

**Why Each Wrong Option is Incorrect**
**Option A:** This option is incorrect as it does not accurately describe Boucher's method of relining.
**Option B:** This option is incorrect as it refers to a different technique used in removable partial denture fabrication.

**Clinical Pearl / High-Yield Fact**
One key aspect to remember when using Boucher's method of relining is to ensure that the border seal material is properly mixed and applied to avoid any inaccuracies in the impression.

**Correct Answer: B. Boucher's technique.**