The asnwer is C because the information isn't sufficient enough to be a complete sentence. What about the supplies on the table? Is someone acknowledging that they're there? Does that make sense; they aren't supplying enough information about the supplies on the table.
Examples (both in chapter 1): Infinitely small sound and dry rain
He asks her if she is going to leave him unsatisfied for the night and she asks how can she satisfy him.
Philip Yancey believes the reason to be comforted after God allows man one hour of suffering in an entire lifetime of good feeling, is the fact that life on Earth lasts just for a short time in comparison with the wonderful future God has for man in heaven, living in eternity.