Which of the following is true of email subject lines?

a. Only “newbies” bother to use them anymore.

b. Subject lines should never give away the content of the message because no one will bother to read it if they already know what the message is about.

c. They can make the difference between a message being read right away, skipped over for later attention, or ignored entirely.

d. They should always be in all caps to get the audience’s attention.