Final answer:
The domain of a function representing the number of people attending a wedding and the cost is likely specific values or all non-negative integers, depending on the data in the table.
Step-by-step explanation:
The question asks about the domain of a function that describes the relationship between the number of people attending a wedding and the cost of the wedding, based on a given table. The domain of a function is the set of all possible inputs (in this case, the number of people attending the wedding) for which the function is defined. Considering that normal wedding attendance numbers should be whole numbers and that the attendance cannot be negative, the domain is most likely limited to specific listed values if provided by the table, or all integers greater than or equal to zero depending on context.
However, since the exact data from the table is not provided, we can consider typical scenarios for such a case. If the table lists specific numbers of people, such as {5, 10, 15, 20, 25}, then the domain would be limited to those specific values (Option D). If the table allows for any number of people as long as it is a non-negative integer, then the domain would be all non-negative integers (Option C).