Write the next sentence in the following story.

How to get someone to stop talking loudly on their phone
Isolate the loud talker.
This will allow you to address the behavior without embarrassing the caller or making a scene in public. See if you can take the caller aside to a secluded corner, office, or wall.

Available choices:
(A). Address them formally, and be as polite as possible. Ask the caller something to the effect of, " sir/ma'am, can you talk a bit lower? Your voice is carrying..
(B). This will make it easier for you to address the caller and make them quiet down for five to 10 minutes at a time. An elderly person in a wheelchair might start addressing the caller but get distracted by the subtle flutter of the door lever..
(C). You can also take the caller aside and ask them to slow down or take a break. This will hopefully put the caller on notice to take a break and slow down..
(D). The caller will have more of a chance of hearing you, which can make a huge difference in resolving your mutual differences. Usually, the caller will likely refer to the person on their phone and won't remember why, thus allowing you to remove them from the conversation and put them on hold... The answer should be
(A).