The Distant Nuclear Fireworks Example Has Us Consider the Last

The distant nuclear fireworks example has us consider the last man on a spaceship watching as Earth is about to crash into the Sun, killing all the life on it. The last man can delay this inevitable event by five years by firing a missile from the spaceship. The authors think our intuitive moral judgment should be that the last man has no such obligation. What would this show?

A) The vice of wrath does all the moral work in the original last man case.
B) Nature has intrinsic value.
C) Nature only has instrumental value.
D) Nuclear power is environmentally friendly.