A company manufactures and distributes tanks designed to transport fish. A semi truck is transporting deadly piranhas in one of these tanks when the tank leaks, introducing baby piranhas into a nearby river. While fishing downstream in the river, a fisherman is repeatedly bitten by these piranhas.

Which legal doctrine supports the fisherman's cause of action against the company?

A. Assumption of risk

B. Battery

C. Negligence per se

D. Strict liability