In a workplace environment, a manager is considering implementing a time-based reinforcement schedule to increase employee productivity. Which of the following statements accurately describes a variable-time reinforcement schedule? Select one answer a) Employees receive a bonus every time they complete a task within a set time frame. b) Employees receive a bonus after a random amount of time has passed, regardless of their performance. c) Employees receive a bonus only if they achieve specific performance targets within a predetermined time period. d) Employees receive a bonus at regular intervals during the workday, regardless of their productivity level