Hash tree is used in data synchronisation. In the worst case the data synchronisation takes ______ time.

Hash tree is used in data synchronisation. In the worst case the data

1.	Hash tree is used in data synchronisation. In the worst case the data synchronisation takes ______ time.
A.	O(logn)
B.	O(n2)
C.	O(nlogn)
D.	O(n)
Answer» E.