Which situation below describes an appropriate use of e-mail in the workplace?

Marcy has subscribed to several newsletters that are unrelated to her job using her employee account

Nate is the office comedian and sends the latest computer jokes out to all the company's employees,

Ben sends out an e-mail to co-workers asking them to sponsor him in a walkathon next month

Kathy forwards a customer inquiry to the billing department because it has the information needed to respond to the
customer's questions