Which of the following statements about mobile payments is TRUE?

B$)$ With mobile payments, payment card data is not saved on the hotel$$s point$-$of$-$sale system.

C$)$ Smartphones with e$-$wallet technology also have a near field communication $($NFC$)$ chip.

A$)$ Mobile payments are made secure through a process called $$tokenization$.$

D$)$ All the above.