Final answer:
The main advantage of external job evaluation for organizations is that it allows them to compare compensation with competitors in the labor market, which helps in attracting and retaining employees by setting competitive wages and benefits.
Step-by-step explanation:
The key advantage that market-based (external) job evaluation provides organizations over job-content-based (internal) job evaluation is A. Comparing compensation to those externally in the same labor market competing for the same employees. This approach gives an organization insight into the competitive landscape, thereby allowing it to adjust its compensation strategies to attract and retain talent effectively. By understanding what other employers are offering, companies can set wages and benefits competitively, ensuring that they are not underpaying or overpaying for talent, which could have direct implications on their operational costs and profits.
In contrast, internal job evaluations focus on the specifics of the job content within the organization and do not account for external market variables. While internal evaluations are important for creating a balanced internal compensation structure, they may miss out on the crucial market factors that influence an employee's decision in choosing where to work.