Which sentence uses negative words correctly?

a.
nobody showed up for any of those contests.

b.
he's never beaten nobody at the game of chess.

c.
there weren't no more cans of black beans left on the shelves.

d.
her flowers were not protected none from the bad weather.

What was the major sacrifice the members of the continental congress dealt with? how did they overcome this obstacle?

Introduction to making a difference: it’s our world, too

London includes a quote about john thornton as he is observing hal attempt to motivate the exhausted dogs "it was idle, he knew, to get between a fool and his folly". if the word "idle" is defined as "of no real worth, importance, or significance", what does this statement mean with regard to hal? who is the fool? what is hal's folly? why would john thornton think it of no real worth or useless to intervene?