Which of the following access log formats are supported by the ProxySG?

Which of the following access log formats are supported by the ProxySG? (Choose all that apply)
(a) ELFF
(b) SQUID
(c) Websense
(d) NCSA

A.
a, b & c only

B.
a, b & d only

C.
a, c & d only

D.
b, c & d only

E.
All of the above