Cynthia and Greg Were Watching an Old Film Where the Actor's

Cynthia and Greg were watching an old film where the actor's lips moved uncoordinated with their speech. "This is crazy," she said to Greg. "I know they are speaking English but I am having a hard time understanding it!" Cynthia was experiencing difficulty due to conflicting _____

A) attentional cues.
B) cross-modal perception.
C) filtering demand.
D) uni-modal perception.