E is out "being"
B is awkward out
C - "in contrast with" is used to compare like things. It is inappropriate in this context
A - instead of cannot be used to compare clauses
Moreover the comparison is bonding
continuously over a broad surface
rather than at a series of regularly spaced points
In metalwork one advantage of adhesive-bonding over spot-welding is that the contact,
and hence the bonding, is effected continuously over a broad surface instead of a series
of regularly spaced points with no bonding in between.
(A) instead of
(B) as opposed to
(C) in contrast with
(D) rather than at
(E) as against being at