I would say the 1st one is the only one correct. The 2nd one should be who, the 3rd one should more and likely be whom, and the last one should probably be who. I don't know if I'm 100% though. I hope I helped.
<h3>This is a late answer but It is C.. (I think *v*) Hope it helps <3 </h3>
Answer:
Explanation:
a long, pointed tooth, especially one specially developed so as to protrude from the closed mouth, as in the elephant, walrus, or wild boar.
