Final answer:
As a sales manager, Diogo's responsibilities include evaluating operations, adjusting the sales team size according to the marketing plan, and recruiting effective salespersons. Setting sales objectives in non-quantifiable terms is not a typical responsibility for a sales manager.
Step-by-step explanation:
The responsibilities of a sales manager like Diogo include several key tasks, but they do not typically include setting sales objectives in vague or non-quantifiable terms. Instead, effective sales managers are expected to set clear sales targets, often with specific numbers to be achieved in a given timeframe. Diogo's responsibilities would logically encompass evaluating the operation holistically to understand where improvements can be made, adjusting the size of the sales force to align with changes in the firm's marketing plan, and attracting and hiring effective salespersons to ensure the sales team performs at its best.