Under the eggshell skull rule, a tortfeasor:

The correct answer to the question "Under the eggshell skull rule, a tortfeasor:" is Option B: Takes the plaintiff as they find them and is liable for the full extent of injuries even if unusually severe.

The other options — A) Is liable only for foreseeable injuries, C) Can claim the plaintiff was too fragile, D) Owes reduced damages — are incorrect for this BAR Exam Prep question. As explained above: Eggshell skull (thin skull) rule: defendant takes plaintiff as found. If plaintiff has a pre-existing condition making injuries worse than expected, defendant is still liable for the full extent.