Read the following excerpt from a US court opinion:
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pleading, the defense was preserved and dismissal of the plaintiffs complaint was affirmed. Shotzman v. Berumen, 363 Ark. 215, 229, 213 S.W.3d 13, 20 (2005); Wallace v. Hale, 341 Ark. 898, 900, 20 S.W.3d 392, 394 (2000); Farm Bureau Mut. Ins. Co. v. Campbell, 315 Ark. 136, 140-41, 865 S.W.2d 643, 645-46 (1993). In contrast, where a party had knowledge of a pending action and did not raise the specific Rule 12(b) defenses in the responsive pleading, the defenses were waived. Posey v. St. Bernard’s Healthcare, Inc., 365 Ark. 154, 164, 226 S.W.3d 757, 764 (2006) (Defendant asserted a statute-of-limitations defense but failed to raise the defense of insufficient service of process in its responsive pleading.); Galley v. Allstate Ins. Co., 362 Ark. 568, 575, 210 S.W.3d 40, 44 (2005) ; S. Transit Co., Inc. v. Collums, 333 Ark.
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What is the most suitable continuation to the opinion? Your options are:
A. holding that the defendant waived its impropervenue defense where its responsive pleading which asserted the defenses of failure to state facts to state a claim and failure to join a necessary party  did not assert the defense of improper venue
B. holding that state could not assert sovereign immunity defense where the state had waived immunity in state court and agreed to remove suit to federal court
C. holding that the failure of all defendant to join in the petition for removal mandated remand to state court
D. holding that defendants failure to assert the defense in any pretrial motions did not waive defendants limitations defense because the assertion of a limitations defense in the answer preserved defendants right to raise the defense both during the first trial and before the second
E. holding that defendant had waived any defense of improper venue when he made the argument only after filing a motion for summary judgment
Reply with [A, B, C, D, E] only.