In Response to a Plaintiff's Prima Facie Case of Discrimination

In response to a plaintiff's prima facie case of discrimination based on disparate treatment,what burden does the defendant have?

A) The defendant does not have a burden,as it is the plaintiff's duty to establish his or her case.
B) The defendant must show that the alleged "business necessity" is not a mere pretext.
C) The defendant must articulate why the policy or practice is a "business necessity."
D) The defendant must articulate a legitimate,nondiscriminatory business reason for the action.
E) The defendant must articulate a reasonable business reason for the action.