A marketing manager's task is to identify variables that describe customers in terms of their own particular characteristics. These variables are called

In marketing, a marketing manager's task involves identifying variables that describe customers based on their specific characteristics.

These variables are known as descriptors because they help in segmenting the market by detailing customer attributes such as age, income, location, and behavior.

While demographic, geographic, and behavioral are types of descriptors, the broader term descriptors encompasses all these categories.

Therefore, Option B is the correct answer as it accurately refers to these variables.