Judging by the organization and details of this paragraph, which concluding sentence would be most appropriate?

A) Shackleton was generally a robust and healthy man, generally speaking.
B) However, others on the ship would have been grateful to get to return home.
C) No one is completely sure how or why Shackleton fixated upon the Antarctic region.
D) Shackleton would get another chance to achieve his goal, but it wouldn't be for another eight years.