Rancho Stables orders ten saddles from Saddles, Inc. The sales contract states that if the tack is defective, Rancho will allow Saddles to repair or replace it instead of rejecting the shipment. When the gear arrives, it is defective. In this case, the perfect tender rule

a. applies only to Rancho.
b. applies to both parties.
c. does not apply.
d. applies only to Saddles.