Which statement provides the best advice about instant messaging and texting on the job?

a$.$ To use instant messaging and texting most efficiently on the job, make yourself available at all times during working hours.

b$.$ Use ample jargon, slang, and abbreviations to make your instant messages and text messages as short as possible.

c$.$ Maintain one contact list for both professional and personal contacts to simplify things.

d$.$ Because instant messages and text messages can be saved, don't say anything that could damage your reputation or that of your organization.