The environment that affects the number and types of competitors a marketing manager must face and how they might behave is called the environment.

The environment that affects the number and types of competitors a marketing manager must face and how they might behave is called the competitive environment.

Explanation:

A competitive environment is a dynamic external system in which a business competes and functions. The more sellers of a similar product or service, the more competitive the environment in which you compete.

It is basically a smaller environment that includes specific organizations with which the organization occurs.

It includes:

c would be the answer