Which of the following is most effective against passwords ?

A.
Dictionary Attack

B.
BruteForce attack

C.
Targeted Attack

D.
Manual password Attack

Explanation:
The most effective means of password attack is brute force, in a brute force attack the program will attempt to use every possible combination of characters. While this takes longer then a dictionary attack, which uses a text file of real words, it is always capable of breaking the password.