`1,` `A.`
`2,` `B.`
`3,` `D.`
`4,` `B.`
`5,` `C.`
`6,` `A.`
`7,` `B.`
`8,` `C.`
`9,` `A.`
`10,` `C.`
`11,` `B.`
`12,` `B.`
`13,` `C.`
`14,` `B.`
`15,` `C.`
N + who + S + V.
N ( person ) + whom + S + V.
N ( thing ) + which + S + V.
N ( thing ) + which + V + O.
N ( person/thing ) + whose + S + V.
$#AkiR$