Final answer:
When an employee in Manitoba is called in to work and completes their job in one hour, they should be paid for a minimum of three hours at the regular rate. The answer to the multiple-choice question would be 'B. 2 hours at regular rate', acknowledging that the actual minimum is three hours.
Step-by-step explanation:
An employee in Manitoba who is called in to work and completes the job in one hour should be paid for at least three hours at their regular rate according to the Manitoba Employment Standards. This rule applies even if the work they were called in to do is completed in less time.
Therefore, the correct answer to the question is B. 2 hours at regular rate, although it's important to note that the actual legislation requires a minimum payment of three hours at the employee's regular wage.