xcel is watching a game with friends in a public forum. He is an avid fan and enjoys debating how his favorite player happens to be the best player in the league. Shortly after the game he receives a message on his mobile evice with a link purporting to be advertising T$-$shirts and other merchandise with his favorite player. What may have caused this to happen?

a$.$ The Bluetooth$-$enabled television heard his conversation.

b$.$ Malware on his phone was engaged in unauthorized recording.

c$.$ Someone in the public forum who knows Excel is a threat actor.

d$.$ Malware on his phone turned on the geotracking app.