Which of the Following Are Perceived Benefits of Using Audit

Which of the following are perceived benefits of using audit software?
1) Quicker auditing - due to the ability to use CAATs to analyse data and improve planning.
2) Auditing the computer system rather than auditing around the computer
3) More testing can be done on bigger volumes of data.
4) Audit costs can be reduced.

A) All of the above
B) 1, 2 and 4
C) 2, 3, and 4
D) 1, 3, and 4