Final answer:
In the con of proximate cause and responsibility, the railroad employee owes a duty to everyone affected by the downstream consequences of the explosives.
Step-by-step explanation:
In the con of proximate cause and responsibility, the railroad employee owes a duty to a) everyone affected by the downstream consequences of the explosives.
Proximate cause refers to the idea that a person is responsible for the foreseeable consequences of their actions. In this case, the railroad employee is responsible not only for those directly harmed by the explosives but also for anyone else who may be affected by the downstream consequences or impacts of the explosion.