Many routine business messages involve such things as teams coordinating their assignments, customers buying products, and colleagues asking if they can meet. Such messages are known as .a. announcements. b. expectations. c. apologies. d. requests. e. claims.

D. Requests

Explanation:

Request simply means asking, soliciting or expressing ones desire for something.

Teams of a business organzation can coordinate their activities through request. Such request could be organzation of meetings to discuss important issues, forwarding of emails to each other to complete a transaction.

Customers who intend to buy a product can make a request to the seller stating the quantity of product to be bought, size, color, flavors, mode of delivery and delivery date.

Colleagues can also make a request to each other either for a business meeting or for a friendly meeting.

Request is basically asking or demanding for something.