What Are Some Possible Negative Outcomes from Hard Positional Negotiation

What are some possible negative outcomes from hard positional negotiation?

A) the negotiation may sour relationships with other negotiators
B) the negotiator may secure an agreement closer to the client's target price
C) too many concessions may undercut the reservation price
D) the agreement may not reflect the true interests of clients
E) the process may be tiring and inefficient