As Kayla Was Introduced to the Seven Members of the Committee

As Kayla was introduced to the seven members of the committee who would be interviewing her for a scholarship,she silently repeated all the names to herself,in order.What was Kayla using,and why

A)  chunking to increase the capacity of her short-term memory 
B)  filtering to temporarily block other information out of short-term memory 
C)  acoustic encoding to process the names semantically 
D)  rehearsal to temporarily store the names in short-term memory