What is the core activity of ABC?

• A. Concrete manufacturing.
• B. Software development.
• C. Marketing consulting.
• D. Financial auditing.

Answer: (A)

Identifying a company's main line of business—the activity that defines its daily operations and value creation. If ABC is described as primarily producing concrete, then the central operation it carries out on a regular basis is manufacturing concrete. This activity drives its resources, processes, and the way it delivers value to customers, shaping its production flow, supply chain, and performance metrics.

The other options point to different kinds of activities—software development, marketing consulting, or financial auditing—each representing a distinct business focus that would not align with a core operation centered on producing concrete. Therefore, concrete manufacturing best fits the description of ABC’s primary activity.