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26.
Emily Dickinson's letters to Susan Huntington
Dickinson were written over a period beginning
years before Susan's marriage to Emily's
ending shortly before Emily's death in 1886,
outnumbering her letters to anyone else.

(A) Dickinson were written over a period beginning
few years before Susan's marriage to Emily's
brother and ending shortly before Emily's death
in 1886, outnumbering

(B) Dickinson were written over a period that begins
a few years before Susan's marriage to Emily's
brother and ended shortly before Emily's death
in 1886, outnumber

(C) Dickinson, written over a period beginning a few
years before Susan's marriage to Emily's brother
and that ends shortly before Emily's death in
1886 and outnumbering

(D) Dickinson, which were written over a period
beginning a few years before Susan's marriage
to Emily's brother, ending shortly before Emily's
death in 1886, and outnumbering

(E) Dickinson, which were written over a period
beginning a few years before Susan's marriage
to Emily's brother and ending shortly before
Emily's death in 1886, outnumber

OA is (E),

If there is a preposition then which can refer to the noun before preposition.

Here :

Emily Dickinson's letters to Susan Huntington Dickinson, which .....