Final answer:
The provided information does not specify details about the data sets work.a or work.b, so it is not possible to determine which is more appropriate for PROC FREQ without additional context.
Step-by-step explanation:
The question is regarding which data set is more appropriate for using PROC FREQ to determine the number of donations made in each of the four quarters.
However, the provided information does not mention specific details about work.a or work.b datasets, making it challenging to give a definite answer on which dataset is more appropriate.
In general, PROC FREQ is used with categorical data, so the appropriate dataset would have discrete categories such as 'First Quarter', 'Second Quarter', 'Third Quarter', and 'Fourth Quarter'.
If one dataset contains these categories and the other does not, the one with the categories would be more appropriate for PROC FREQ. Without more context, any further analysis would be speculative.