$4$ points

Due to Dave Defendant's tailgating and speeding, his car collides with a car driven by Myra Mason. As a result of the collision, Myra's car collides with a telephone pole, causing it to fall. The falling pole then takes out some electrical power lines, causing a blackout for a $20-$mile radius, including the neighborhood where Fred Fish resides. Fred has an aquarium, and the blackout causes the aquarium heater to go out, killing Fred's ten valuable tropical fish. Fred sues Dave under the theory of negligence. In this case, which element of negligence will be the most difficult for Fred to prove?

Cause in fact between the breach and the injury.

Proximate causation between the breach and the injury.

Breach of duty of reasonable care in operating the car.

All of the above are equally difficult to prove under these facts.