Plaintiff filed a timely diversity action in federal district court against Defendant. Plaintiff claimed that Defendant was negligent when he attempted to kiss her in his apartment, causing her to pull away from Defendant and injuring her head. After the statute of limitations has run, Plaintiff has filed a motion to amend her complaint to add a claim for battery based on the events in Defendant's apartment, when she realized that she might be able to get punitive damages against Defendant for an intentional tort. Plaintiff has filed a motion to amend her complaint to add the claim of battery. Which of the following best describes how the court should decide the motion? A. Grant the motion because the claim for battery arose out of the same conduct that gave rise to the negligence claim. B. Grant the motion only if Defendant has notice of the new claim within the statute of limitations. C. Deny the motion unless the state's law that provides the statute of limitations would allow relation back. D. Deny the motion unless the court finds that Plaintiff's failure to include the battery claim was a result of a mistake for which there is a reasonable excuse for Plaintiff's failure to include the battery claim in a timely manner