回答下列各题 MobilePhone Manners Mobile phones have changed the waywe communicate(交流)；they have also brought about problemsin phone manners(礼仪)．Gaik Lira，aSingapore-based advisor，has some adviceon phonemanners． When dealing with missed calls，the person being called should return the call．“Calls should bereturned as soon as possible，and no laterthan the following day．Anything laterthan that，and anapology or a reason for the delay should go with the call．” Textmessages should be kept short and to the point．If they go beyond tour or five lines，call or e—mail instead．“The use ofshort forms should be among family members and friends．never in abusiness simafion．” Speak in a low voice as if you weretalking to someone next to you．If theconnection is bad，don’t raise your voice in order to be heard，simply move to another place where the connection may bebetter．And if that doesn’t work，tell the caller to callyou back or offer to call at a later time． When a conversation is cut off dueto a bad connection，the person whostarted the conversa—tionshould call back．“It may be inconvenientfor the other person to return the call，especially if it’s anunlisted number，or an overseas call．” When running late for a date ormeetin9，it is acceptable totext to inform. that you’II be de—layed．Messages should be apologetic．“A message like‘Sorry．Will be about 30 minutes late due toflight delay’is considered politeand thoughtful．” Taking calls during meetings isonly acceptable if you have informed the chairperson that you areexpecting an urgent(紧急的)call．If you get an unexpected but urgent call，apologize to those presentand offer a quick explanation as to why you have to take that call．Then leave the room to continueyour phone conversation． What should one do if he has missed a call？

A. Textan apology to the caller．
B. Callback if it is from abroad．
C. Waittill the caller calls again．
D. Returnthe call as early as one call．