To which basic element in the group communication process is grace giving special attention when she prepares for an important group meeting by making sure her business suit is pressed, that her hair is well-groomed, that her perfume is pleasant but subtle, and that she takes a breath mint before entering the meeting room?

Channel

Explanation:

Channel

Channel is the platform or object or subject that is used in conveying the message to the audience or receiver.

Hearing news on TV or viewing news on TV all are examples of channels used to convey messages.

Another channel is when one write a letter or an email to the receiver or audience an example of written channels.

Grace is using spoken channel which includes face to face speeches, telephone conversation, voice mail and other audio messages .

As a channel of message in which grace will be doing face to face presentation or speech she want to make sure she looks the part because that can have an impact on how people receive the message so she want to eliminate any distraction that can interfere with her message as she channels it.

the answer is d.index