Which music might even interfere with the brains’ reasoning ability The ______.

A．to test whether smoking has a positive effect on the mental capacity of smokers
B．to show how smoking damages people’s mental capacity
C．to prove the smoking affects people’s regular performance
D．to find out whether smoking helps people’s short-term memory

A．There won’t be any neighbors in the new apartment.
B．The neighbor won’t return late any more.
C．She wants to have a quieter place.
D．She doesn’t want to have neighbors.