Passage Summary: It is hard to focus when someone nearby is on a cell phone because your brain tries to figure out the other half of the conversation and the person is talking too loudly.

Reasoning: Hearing half a conversation forces the brain to fill in the blanks, and the high volume of the speaker further pulls focus away from other tasks.

Analysis: We need to find a statement that follows logically from these combined facts about distraction and cognitive effort. Since the stimulus identifies two distinct reasons for the distraction—guessing the missing dialogue and the volume—the correct answer will likely synthesize these into a broader claim about why cell-phone talk is uniquely intrusive. Avoid any answer choices that make strong predictions about how to 'fix' the problem. Look for an answer that stays within the bounds of these specific mechanisms of distraction.