Given a message and its n-bit hash result, the expected workload of finding a message that hashes to the same value is of the order _______________

Given a message and its n-bit hash result, the expected workload of fi

1.	Given a message and its n-bit hash result, the expected workload of finding a message that hashes to the same value is of the order _______________
A.	2<sup>(n/2)</sup>
B.	2<sup>(n-1)</sup>
C.	2<sup>(n)</sup>
D.	2<sup>(2n)</sup>
Answer» D. 2<sup>(2n)</sup>