Which IPS signature regular expression CLI command matches a host issuing a domain lookup for www.theblock.com?
A. regex-string (x03[Tt][Hh][Ee]x05[Bb][Ll][Oo][Cc][Kk])
B. regex-string (x0b[theblock.com])
C. regex-string (x03[the]x05[block]0x3[com])
D. regex-string (x03[T][H][E]x05[B][L][O][C][K]x03[.][C][O][M]
