If a definition begins with "when" or "where," this is often a sign that:

A) it will be an excellent definition
B) it will be too broad
C) it will be too narrow
D) it will not include a genus
E) it will be circular

Definitions starting with "when" or "where" often fail to include a genus, which is a broader category or class that the term belongs to. This approach focuses on circumstances or locations rather than defining the essential nature or category of the term.