Answer:
a) negative punishment — Tommy receives a written reprimand from his boss following a series of customer complaints
Step-by-step explanation:
All of the options except for the first one are incorrect, this is because negative punishment usually revolves around someone doins something wrong and whoever is the authority for that person, in this case the boss, takes a negative action, by taking something from him, or just by lecturing him. Positive punishment revolves around giving the person stumuli that would help him stop the undesired beheaviour.