Brute-force attacks have increased because ___________.

A.
The increased use of permutations and transpositions in algorithms

B.
As algorithms get stronger, they get less complex, and thus more susceptible to attacks

C.
The increase in processor speed and power

D.
The reduction in key length over time

Explanation:
A brute-force attack is very resource intensive. It is guessing
different values over and over again until the correct one is obtained. As computers
have more powerful processors added to them attackers can carry out more powerful
brute-force attacks.