Some steps to construct an angle mnt congruent to angle pqr are listed below. step 3 is not listed.

step 1 - draw a segment nt.
step 2 - use a compass to draw an arc from point q which intersects the side pq of angle pqr at point a and the side qr at point b.
step 3 -
step 4 - adjust the width of the compass to ab and draw an arc from point x such that it intersects the arc drawn from n in a point y.
step 5 - join points n and y using a straightedge.

which statement describes step 3 correctly?
a. without changing the compass width, draw an arc from point t which intersects the segment nt at a point x.
b. without changing the compass width, draw an arc from point a which intersects the segment nt at a point x.
c. without changing the compass width, draw an arc from point b which intersects the segment nt at a point x.
d. without changing the compass width, draw an arc from point n which intersects the segment nt at a point x.