Ben uses a compass and a straightedge to bisect angle pqr, as shown below:

which statement best explains why ben uses the same width to draw arcs from a to b that intersect at s?

option a: bq = bs when angle aqs is congruent to angle bqs.

option b: aq = as when angle aqs us congruent to angle bqs.

option c: angle aqs = angle bqs when as = bs and aq = bq

option d: angle aqs is congruent to angle bqs when as = bq and bs = aq