Jane, Mark, and Guy are farmers who store their grain in three silos. Jane contributes half of the grain, Mark a third, and Guy a sixth. A tornado hits two of the silos and scatters the grain. If each farmer can prove how much they deposited in the silos, how much of what is left belongs to each?

a. Jane owns half, Mark a third, and Guy a sixth.

b. Because only a third is left, Mark owns it all.

c. Because Jane and Mark lost the most, they split what is left equally.

d. Jane, Mark, and Guy share what is left equally.