The traditional definition of <em>ditch </em>could be option A, a long narrow trench dug in the ground, generally to hold or carry water. However, within this context, the correct option is B. a grave.
In this excerpt we can identify the original meaning of the word, but at the same time the element that was thrown in the ditch was a body, not water. Therefore, the correct answer is a grave.
Writers must research for facts and answer. They need to research to make sure every word the say is true. With their research they turn it into their own words mixed with their own ideas.