Which IPS signature regular expression CLI command matches a host issuing a domain lookup for www.theblock.com?

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]