Ray Was Given a Long List of Food Words to Memorize,and

Ray was given a long list of food words to memorize,and when he was asked to recall those words he started listing them in a different order than they had originally been listed.He first listed all the words that were names of fruits,then the names of all the dairy products,and so on.What do we call this tendency to group items into logical patterns

A)  clustering
B)  flashbulb memory 
C)  source monitoring
D)  spreading activation