Dewayne worked all weekend to prepare for his sales presentation, putting in almost $72$ hours straight to make sure the presentation was thorough. At the end of the sales meeting, his boss commented on how strong Dewayne's presentation was and told all of the employees present how extremely impressed she was by Dewayne's attention to detail. This has motivated Dewayne to get to work right away on his next sales presentation. What type of reinforcement has Dewayne's boss given to him?

This is an example of positive $($reward$)$ reinforcement.

This was more like a compliment rather than reinforcement for desired behavior.

This is an example of negative reinforcement where Dewayne made sure to avoid punishment.

This is an example of extinction as reinforcement where undesired behavior wasn't present.