Which workplace task can be best addressed by using e-mail?
alerting your boss of an emergency that needs immediate attention
sending a status report to all employees working on one project
giving a coworker some advice on how to better do her job
informing your boss and coworkers that you are quitting

The work place task that can be best addressed by using e-mail is sending a status report to all employees working on one project

Explanation:

Email can be used to convey your message at workplace when:

When you need to get in touch with a person who is not responding to your calls.When you need to contact someone who is located geographically in a different location.when the information you want to convey/share is not time sensitive(time bond)E-mails are used at workplace to convey electronic files such as word documents,spreadsheets.Emails are also used for communications where a written record of the same is required.When a employer need to address large number of employees an email is used to communicate such information

Don't say anything that will offend her, make her feel better and talk about happ things.