Give typed full explanation

15. In which of the following circumstances could an employee make a claim for recovery when the at-will employment is terminated? Check all that apply. a. Some event in the employment relationship that creates contractual rights between the employer and employee. b. An assurance of an increase in compensation. c. On the day of orientation, the employee was told by a department chair that after ninety days, the employee would be given additional compensation where the amount is determined by a schedule in the company regulations. d. A social media marketing employee is fired after misleading Facebook messages posted by a disgruntled former employee causes an inability to do the marketing job. e. An employee is fired after taking part in an interview by the Georgia Commission on Equal Opportunity. f. A fifty-five-year-old files a wrongful termination lawsuit in the Superior Court of Fulton County alleging age discrimination.