Which statement best explains why Ben uses the same width to draw arcs from A and B that intersect at S?

BQ = BS when ∠AQS ≅ ∠BQS.
AQ = AS when ∠AQS ≅ ∠BQS.
∠AQS ≅ ∠BQS when AS = BS and AQ = BQ.
∠AQS ≅ ∠BQS when AS = BQ and BS = AQ.