Final answer:
Portland Ceramics may not be considered a small business based on the textbook's criteria.
The correc option is a.
Step-by-step explanation:
The textbook's criteria for defining a small business includes several factors, such as having fewer than 500 employees, operating in the manufacturing sector, and having a low annual revenue.
If Portland Ceramics meets all these criteria, it would not be considered a small business according to the textbook.
The correc option is a.