Final answer:
The office has 4 unique job roles: Supervisor, Assistant, Clerk, and Data-Entry Operator. Modern businesses also divide tasks into multiple job roles, which can range from a few in simple businesses to hundreds in complex organizations.
Step-by-step explanation:
In an office with distinct job roles such as one Supervisor, one Assistant, two Clerks, and two Data-Entry Operators, we can determine the number of distinct job roles by identifying the unique positions listed. The job roles mentioned are Supervisor, Assistant, Clerks, and Data-Entry Operators. Given that Clerks and Data-Entry Operators are both mentioned in plural but represent a single job role respectively, there are a total of 4 different job roles in this office setting. Therefore, the correct answer to the question is b) 4 job roles.
Modern businesses often divide tasks across a variety of job roles, just like this office example. In a simple business structure like a restaurant, job roles can range from top chef to business manager. On the other hand, a complex business such as a hospital or manufacturing factory may have hundreds of job classifications due to more specialized divisions of labour.