Answer:
B. False
Step-by-step explanation:
Remember, the question is whether the ringtone is likely to be more stressful to Wei than the jackhammering.
Obviously she's distracted by the ringtone from her smartphone, however what is more stressful (irritating) to Wei is the sound from the jackhammer.
Therefore, the ringtone is not more stressful than the jackhammering.