The least questionable negotiating tactic from those described is$?$

Correct Answer

$$

as negotiations are concluding the other party says she neglected to mention a particular item and would like to discuss it now; she aplogizes for the oversight.

$$

as you are discussing a proposal the party tells you that an agreement must be reached today or a settlement on the issue cannot be guaranteed.

$$

as the parties near agreement on an issue, the other party demands you "split the difference".

You Answered

$$

during the negotiation one party says s$/$he is going to take some time to think about the proposal and promises to get back to you some time in the future..