Read the following excerpt from a US court opinion:
```
its interests. , Summary judgment should be granted in favor of defendant on this issue. ■ B. Plaintiffs also ask the Court to find that defendant .has, as a matter -of law, waived all defenses, other, the § 207(e)(2) regular- rate exclusion at issue in this opinion. Dkt. #87, at 22. Specifically, plaintiffs assert that defendant did not adequately raise any additional defenses in its pleadings or discovery responses, particularly identifying the Motor Carrier Act exemption (MCAE) as improperly raised. Id. The Federal Rules of Civil Procedure require a party responding to a pleading to “state in short and plain terms its defenses to each claim asserted against it” and to “affirmatively state any avoidance or affirmative defense — ” Fed.R.Civ.P. 8(b), ( . 2004) (unpublished per curiam) ; Williams v. Ashland Eng’g Co., 45 F.3d 588,
```
What is the most suitable continuation to the opinion? Your options are:
A. holding that defendants answer sufficiently encapsulated the elements of an affirmative defense to have put plaintiff on notice that defendant intended to rely on it
B. holding that the plaintiff waived an objection to the defendants failure to plead qualified immunity as an affirmative defense
C. holding that unpleaded affirmative defense was properly considered by the district court where plaintiff had notice of the defense and an opportunity to respond
D. holding that defendant does not waive an affirmative defense if defendant raises it at a pragmatically sufficient time such as summary judgment and the defendants failure raise the affirmative defense in its answer did not cause the plaintiff prejudice
E. holding that the plaintiff did not establish a waiver where the defendants answer had put the plaintiff on notice of an arbitration defense
Reply with [A, B, C, D, E] only.