A、Make it as short as possible. B、Use simple and clear language. C、Adopt an informal style of writing. D、Avoid using capitals fo

In my line of work, I receive a lot of e-mails. I also send a lot of e-mails, though social media and messaging apps have taken over some of the roles from e-mail as a form of communication. (22) E-mail is likely to retain an important role for business communication in the future. Surprisingly though, a lot of companies and organizations lack formal guidelines for e-mailing. As most of you will soon be entering the workforce, I would like to share with you my own rules for e-mailing. If someone sends you an e-mail, reply to them, acknowledging the e-mail. A simple "thank you" lets the sender know that their e-mail has arrived safely, that it has not been lost among what could be fifty other emails that have arrived in your e-mail in box that day. (24) It is not necessary to reply to a mass e-mail sent to numerous recipients. These emails are often informative rather than personalized correspondence requiring a response or action. (23) But it’ s common politeness to respond to a personal message preferably within 24 hours of receiving it.
    It’ s also important to use proper English. Just because e-mails are a quick form of communication doesn’ t mean e-mails, especially business e-mails, should be written using informal, shortened forms of words. Think of an e-mail as a letter. Spelling, grammar and punctuation should not be overlooked. (25) And never use capitals to emphasize a word or words in an e-mail. It’ s the same as yelling.
Questions 22 to 25 are based on the passage you have just heard.
22. What does the passage say about e-mail?
23. What should one do upon receiving a personalized e-mail?
24. What does the passage say about a mass e-mail?
25. What should one do when writing a business e-mail?