单选题Which interface provides the ability to see changes in real-time as they occur ？ （）AConcurrentMapBjava.util.AbstractMapCObservableMapDInvocableMap
题目
单选题
Which interface provides the ability to see changes in real-time as they occur ？ （）
A
ConcurrentMap
B
java.util.AbstractMap
C
ObservableMap
D
InvocableMap