Frances Wright's book on America contrasted the
republicanism of the United States with what she saw
as the aristocratic and corrupt institutions of England.
(A) with what she saw as
(B) with that which she saw to be
(C) to that she saw being
(D) and that which she saw as
(E) and what she saw to be

answer is A

I did not understand the grammar tested here. Please help.

2) The complex tax dispute between the Covered Bridge
Mall and Harris Township is not likely to be
adjudicated for several years, and, in the meantime,
both sides are intent on creating difficulties for the
other.
(A) both sides are intent on creating difficulties for
the other
(B) both sides are intent on creating difficulties for
each other
(C) each side is intent on creating difficulties for the
other
(D) each side is intent on creating difficulties for one
another
(E) the sides are both intent on creating difficulties for
each other

answer - C

why is B wrong?