Answer:
B- Variable ratio
Step-by-step explanation:
In operant conditioning, a variable-ratio schedule is a schedule of reinforcement where a response is reinforced after an unpredictable number of responses. This schedule creates a steady, high rate of responding.
Shea is purchasing the tickets despite losing the other time, which conforms with the reinforcement and rate of response.
Gambling and lottery games are good examples of a reward based on a variable ratio schedule.