Final answer:
The marketer's external environment encompasses only uncontrollable variables such as political, economic, social, technological, environmental, and legal conditions, as well as market behavior and competition. Option c only uncontrollable variables
Step-by-step explanation:
The external environment of a marketer includes c. only uncontrollable variables. This encompasses factors such as political, economic, social, technological, environmental, and legal conditions (often abbreviated as PESTEL), as well as competition and target market behavior that the company cannot control. Understanding these factors is critical since they can affect how a company operates and its strategic decisions. For instance, changes in regulatory policies or consumer trends can significantly influence the market landscape, thereby affecting marketing strategies.