**Core Concept**
The global age for caries detection and survey is a standardized method of assessing the prevalence and severity of dental caries in populations. It is used to evaluate the caries experience of individuals and to monitor trends over time.

**Why the Correct Answer is Right**
The global age for caries detection and survey is based on the World Health Organization's (WHO) criteria for assessing dental caries. It takes into account the number of decayed, missing, and filled teeth (DMFT) in individuals of a specific age group. The DMFT index is calculated by adding the number of decayed teeth (D), missing teeth due to caries (M), and filled teeth (F) in a given age group. This index provides a comprehensive picture of the caries experience of a population and helps in planning preventive and treatment measures.

**Why Each Wrong Option is Incorrect**
**Option A:** This option is incorrect as it does not specify a widely accepted method for assessing caries experience.
**Option B:** This option is incorrect as it may refer to a different age group or a different index for assessing caries.
**Option C:** This option is incorrect as it may refer to a different age group or a different method for assessing caries.

**Clinical Pearl / High-Yield Fact**
The global age for caries detection and survey is an essential tool for public health dentistry, as it helps in identifying high-risk populations and planning targeted interventions to prevent and control dental caries.

**Correct Answer: D. Global Age for Caries Detection and Survey is DMFT (Decayed, Missing, and Filled Teeth) Index.**