Which of the following demonstrates the law of demand? ( )

A、Jon buys more pretzels at $1.50 each since he got a $1 raise at work.;

B、Melissa buys fewer muffins at $0.75 each than at $1 each.;

C、Dave buys more donuts at $0.25 each than at $0.50 each.;

D、Kendra buys fewer Snickers at $0.60 each since the price of Milky
Ways fell to $0.50 each.