Identify an Instance Where the Second Statement Explains the Reason

Identify an instance where the second statement explains the reason for the first statement.

A) Statement 1: Negotiations ended in a "walking away from the table" situation. Statement 2: The negotiator was driven by hubris.
B) Statement 1: Negotiators failed to recognize and capitalize on their win-win potential. Statement 2: Negotiation was conducted in a protected environment.
C) Statement 1: One of the negotiators made large concessions, resulting in a too-small share of the bargaining pie. Statement 2: The negotiator was driven by pride and ego.
D) Statement 1: The best alternative was not chosen in a negotiation. Statement 2: Both the parties were not interested in the outcome of the negotiation.