What does Napoleon do to deceive Mr. Whymper and portray Animal Farm as prosperous?

He threatens the animals to look happy.

Napoleon orders the bins in the store-shed to be filled with sand, topped off with grain and meal, and then shows them to Mr. Whymper.

He feeds Mr. Whymper an extravagant meal of food grown on the farm.

He gives Mr. Whymper a gift of 400 eggs.

The correct answer is: He orders the bins in the store-shed to be filled with sand, topped off with grain and meal, and then shows them to Mr. Whymper.