With no explanation, chose the best option from "A", "B", "C" or "D". the doctors. When a health care liability claim involves a vicarious liability theory, an expert report that adequately implicates the actions reports containing expert opinions as to claims against the defendant physicians, thereby implicating the Hospital’s conduct under Nguyen’s pleaded theory of vicarious liability, we conclude that the Hospital was required to file any objections it had to the reports by the- 21-day deadline. See Neason, 352 S.W.3d at 259. The Hospital argues its motion to dismiss should have been granted because it conclusively established the four doctors were not its agents or employees. Wé disagree. The Hospital was required to present its objections within 21 days of Nguyen’s serving her expert reports, which it failed to do. See Troeger, 274 S.W.3d at 108 (<HOLDING>). The Hospital argues allowing the ease to

A: holding failure to timely object to magistrate judges recommendation waives appellate review of factual and legal questions
B: holding that failure to object in a timely fashion to a magistrate judges report and recommendation generally constitutes a waiver of the defaulting partys right to appeal provided that the parties received clear notice of the consequences of their failure to object
C: holding claimed errors waived for failure to timely object
D: holding defendants failure to object timely waives its right to challenge expert report
D.