What do the songs: "Billionaire", "Got Money", "Gold Digger" and "I wanna Be Rich" have in common?

The night before setting off, the temperature ___and snow fell. A: dipped B: dinged C: dappled D: D digger

Keep in mind the well digger when you drink the water. A: 当你喝水的时候要想念着掘井人的安危。 B: 当你喝水的时候要把那个不错的挖井人记在心里。 C: 吃水不忘挖井人。