Final answer:
Large public accounting firms often organize their firms along functional lines, but there is a trend towards project-based teams.
Step-by-step explanation:
Large public accounting firms often organize their firms along functional lines. This means that the firm is structured based on different functions or departments such as auditing, tax, and advisory services. Each function or department has its own hierarchy and staff members specialize in their respective areas.
However, it's worth noting that in recent years, there has been a shift towards a more team-based approach in many organizations, including accounting firms. This approach focuses on creating project-based teams or cross-functional teams to tackle specific tasks or projects.
Therefore, the answer to the question is c. Project-based teams. While functional lines (a) and hierarchical lines (b) are also common structures, the trend in accounting firms is leaning towards project-based teams for increased collaboration and flexibility.