Step-by-step explanation:
The criteria that a nutrient must meet to be classified as a vitamin are:
A. The substance cannot be made in the body.
B. The body requires the substance for maintaining good health.
C. Absence of the compound from the diet for a defined period produces deficiency symptoms that, if caught in time, are quickly cured when the substance is resupplied.
Option D is not necessarily a requirement for a substance to be classified as a vitamin. While synthetic versions of vitamins are often available in dietary supplements, this is not a defining characteristic of vitamins.