The Trolley Problem is an important thought-experiment in ethical philosophy. Suppose Alf concludes that in the Trolley Problem the agent is morally required to pull the lever and divert the trolley. Which of the following moral principles may be implied by Alf’s conclusion?
(a) We are morally required to save many lives at the expense of one life.
(b) The value of a human life is quantifiable and, although that value may be very high, it is not infinite.
(c) We have a moral duty to act in such a way that we preserve or save or bring about as much value in the world as we possibly can.
(d) Even if there is some moral difference between killing and letting die, that difference is not so great that we may not sometimes have a moral duty to kill in order to not let die.
(e) All of the above.

The Trolley Problem which was redifned by Phillipa Foot, an English PPhilosopher, in 1967 explain the ethical dilemma, where by, the main problem of this ethical philosophy deals about whether to:

1. Do nothing and allow the trolley to kill the five people on the main track.

2. Pull the lever, diverting the trolley onto the side track where it will kill one person.

Hence, in this case, should Alf concludes that in the Trolley Problem the agent is morally required to pull the lever and divert the trolley, which will means, that, the Trolley will kill ONE person instead of FIVE. This implied that, Alf has concluded that "We are morally required to save many lives at the expense of one life."