Principal of macroeconomic

Which of the following events in the market for smartphones illustrates the law of demand? 1. The price of a smartphone falls. 2. Producers announce that smartphone prices will fall next month. 3. The price of a call made from a smartphone falls. 4. The price of a call made from a land-line phone increases. 5.An increase in memory makes smartphones more popular. 0 A. Events #1, #3, and #4 O B. All 5 events 0 c. Only Event #2 O D. Only Event #1 O E. Events #2, #3, #4, and #5