The feedforward part of the conversation should do all of the following except
a.
identify the tone
b.
introduce the purpose
c.
give leave-taking clues
d.
establish a time-frame

c. Give leave-taking clues

Explanation:

In a Feedforward conversation, a person provides future-focused suggestions to another, with the aim of supporting that person's improvement or success. In this part, to establish a time-frame (the time when it will take place), to introduce the purpose (what this conversation going to be about and its aim), and to identify the tone (the general character or attitude of the people involved and the setting) are important. However, to give leave-taking clues are not necessary, as for a simple indication of the end of the conversation would be enough and would be considered more polite.