Sentence Correction

IMO - B

The last “wild” Indian {in North America}, {according to anthropologist Alfred Kroeber}, was the lone survivor {of California’s lost Yahi tribe},

which staggered out {of the mountains} {near Lassen Peak} {in 1912},
deep in mourning for the last of his companions,
expecting to be butchered and eaten by white ranchers.

Which marks the dependent clause in this sentence and refers to the "lone survivor". The next two parts simply provide additional information about the "lone survivor" who staggered out of the mountains.

Hence "Which" should be "who" - Choice B

Choice E does not appear to be correct since it will result in an incomplete sentence. (I have removed some prepositional phrases for the sake of clarity)

The last “wild” Indian was the lone survivor,
having staggered out {of the mountains}
deep in mourning for the last of his companions,
expecting to be butchered and eaten by white ranchers.

This sound incomplete, whereas the sentence with Choice B appears to be complete:

The last “wild” Indian was the lone survivor,
Who staggered out {of the mountains}
deep in mourning for the last of his companions,
expecting to be butchered and eaten by white ranchers.

I hope I am correct in saying that B is the answer. Also, please let me know if this approach makes sense.

B for me too...