Sport Chek You Work as a Buyer for Sport Chek at Its

Sport Chek
You work as a buyer for Sport Chek at its head office in Toronto. The regional manager, your boss, has asked you to collaborate with Hans, a co-worker in Sport Chek's Winnipeg office, to write a report comparing the costs, retail prices, features, customer reviews, sales histories, and other data of the various bicycles that Sport Chek sells. You and Hans agree to work on different sections of the report and then combine the two sections. Hans agrees to get his portion to you a week before the manager has asked for the completed report.
-You are manager of human resources for a local branch of Staples, and you have volunteered to organize a retirement party for one of your colleagues. According to the theory of media richness described in the text, which of the following will likely be the richest channel that you could choose to communicate the details of the party to your staff, and ask to receive an RSVP?

A) a document posted on the human resources page of the Staples Web site
B) an e-mail to all staff
C) a meeting for all staff before the store opens
D) an announcement posted on the bulletin board in the staff lunch room