Consider the two E-R diagrams in Figure 2-25, which represent a database of community service agencies and volunteers in two different cities (A and B). For each of the following three questions, place a check mark under City A, City B, or Can’t Tell for the choice that is the best answer.

a. Which city maintains data about only those volunteers who currently assist agencies? b. In which city would it be possible for a volunteer to assist more than one agency? c. In which city would it be possible for a volunteer to change which agency or agencies he or she assists? City A City B Can't Tell