Susan takes her car to the gas station and taps her phone to the gas pump in order to pay. Susan is using ___________.
A) a mobile wallet
B) location services
C) SMS
D) a mobile portal
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Susan takes her car to the gas station and taps her phone to the gas pump in order to pay. Susan is using ___________.
A) a mobile wallet
B) location services
C) SMS
D) a mobile portal