Which of the Following Statements About an Age-Discrimination-In-Employment Case Is

Which of the following statements about an age-discrimination-in-employment case is true?

A) The plaintiff must prove by a preponderance of direct evidence that age was a motivating factor for the challenged employer decision.
B) The plaintiff must prove by a preponderance of the evidence,which may be direct or circumstantial,that age was a motivating factor for the challenged employer decision.
C) The plaintiff must prove by a preponderance of direct evidence that age was the but-for cause of the challenged employer decision.
D) The plaintiff must prove by a preponderance of the evidence,which may be direct or circumstantial,that age was the but-for cause of the challenged employer decision.