**Core Concept**
The 'D'-form of amino acids is a type of enantiomer, which is a molecule that is mirror-image identical to another molecule. In the context of amino acids, the 'D'-form refers to the specific three-dimensional configuration of the molecule. This concept is crucial in understanding the stereochemistry of amino acids and their interactions with enzymes.

**Why the Correct Answer is Right**
The 'D'-form of amino acids is derived from the dextrorotatory form of glyceraldehyde. This is a key concept in the field of stereochemistry, where the 'D' designation is used to indicate the configuration of the molecule relative to the dextrorotatory form of glyceraldehyde. The 'D'-form of amino acids is also known as the 'L' form, and it is the most common form found in nature. This is because the enzymes responsible for protein synthesis in living organisms preferentially select the 'L' form of amino acids.

**Why Each Wrong Option is Incorrect**
**Option A:** This option is not relevant to the derivation of the 'D'-form of amino acids.
**Option B:** This option is incorrect because the 'D'-form of amino acids is not derived from the levorotatory form of glyceraldehyde.
**Option C:** This option is not a correct answer because it does not accurately describe the origin of the 'D'-form of amino acids.

**Clinical Pearl / High-Yield Fact**
It's essential to remember that the 'D'-form of amino acids is not typically found in nature, except in certain bacterial and plant systems. This knowledge is crucial in understanding the metabolism of amino acids and their interactions with enzymes.

**Correct Answer: C. The dextrorotatory form of glyceraldehyde.**