Which of the following guidelines about the subject line of e-mail messages is most appropriate?

make sure you provide all the details in the subject line in case the receiver does not have time to read the whole e-mail.
use the subject line wisely to let your reader know the main purpose of the e-mail.
try to keep the subject line very short, such as just one or two words.
avoid using a subject line unless the e-mail is very important.

When early motion pictures played in movie theaters, they were often accompanied by live organ or piano music. which of the following are the most likely reasons that this happened? (select all that apply). the music was provided to distract audience members from the loud sounds made when filmstrips were changed. the music accompanied the movies because the movies were silent and audiences were used to hearing music during plays in theaters. the music usually was played before, and sometimes after the movie, as an alternative form of entertainment. the music viewers to interpret the dramatic action in the films.