PLEASE HELP ME NOWWWWW PLS Select the correct answer.
Given:
is a right angle

Prove:

A perpendicular line between AC and BD has a point of intersection of midpoint O

Since
is a right angle, it is
.
is supplementary to
, so
. By the substitution property of equality,
. Applying the subtraction property of equality,
.

What statement is missing from the proof?
A.
and
form a linear pair.
B.
and
form a linear pair.
C.
and
are vertical angles.
D.
and
are vertical angles.