**Core Concept**
The term 'cariogenic' refers to substances that contribute to the development of dental caries, a bacterial infection leading to demineralization of tooth enamel and dentin. This process is primarily influenced by the presence of fermentable carbohydrates and sugars in the oral cavity, which are metabolized by oral bacteria to produce acid.

**Why the Correct Answer is Right**
The correct answer is associated with the breakdown of complex carbohydrates into simple sugars, which are then fermented by oral bacteria such as Streptococcus mutans. This process results in the production of acidic byproducts, including lactic acid, which lowers the pH in the oral cavity and leads to tooth demineralization. The correct answer is a type of sugar that is commonly found in various food products and is known to contribute to the development of dental caries.

**Why Each Wrong Option is Incorrect**
**Option A:** This option is not typically considered cariogenic as it is not easily broken down by oral bacteria into simple sugars.
**Option B:** While this option is a type of sugar, it is not as commonly associated with dental caries as the correct answer.
**Option C:** This option is not a type of sugar and is not typically considered cariogenic.

**Clinical Pearl / High-Yield Fact**
It is essential to note that cariogenic substances can be found in various food products, including baked goods, sweets, and even some types of milk. Patients with a high risk of dental caries should be advised to limit their consumption of these substances and practice good oral hygiene habits.

**Correct Answer: D. Sucrose**