Final answer:
The word 'surreptitiously' means to do something stealthily or secretly. Reading a text message while someone is telling you a story would most likely be done surreptitiously.
Step-by-step explanation:
The vocabulary word being asked about is 'surreptitiously' which means to do something in a stealthy or secretive manner. Out of the activities listed, the one that would most likely be done surreptitiously is reading a text message while someone else is busy telling you a story. This is because you would need to do it secretly without the other person noticing.
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