Soto loses his cat $($Toby$)$ and posts signs in his neighborhood offering a reward for the cat's return. While hiking, Dominguez finds Toby lying in a ditch, injured. Dominguez has visited Soto's home in the past and recognizes Toby's distinctive color markings. He picks up Toby and returns the cat to Soto who praises Dominquez as a "Good Samaritan." Driving out of Soto's neighborhood, Dominguez sees $($for the first time$)$ one of Soto's lost pet reward signs attached to a telephone pole. Dominguez brakes to a halt, jumps out of the car, and rips off the sign offering a $$200$ reward for the cat's return. He returns to Soto's house and demands payment of the reward. Soto refuses to pay. Is Soto contractually obligated to pay the reward to Dominguez?

a$.$ Yes, because Dominguez provided 'Good Samaritan' service.

b$.$ Yes, because Soto received an unexpected benefit.

c$.$ No$,$ because Dominguez did not see the sign posting the reward offer before returning Toby to Soto

d$.$ No$,$ because Dominguez found the cat by accident.