The bargaining environment is defined as:

A) The diverse set of external influences on labor and management as they bargain a contract
B) The degree of bargaining power the parties have in negotiations
C) The ability of the parties to establish their BATNA's (or MLATNA's)
D) The environmental impact of any final contract terms

The bargaining environment refers to the various external factors that impact the negotiations between labor and management in the process of bargaining, such as economic conditions, legal and regulatory frameworks, political climate, and societal attitudes. Therefore, option A is the most appropriate description of the bargaining environment. Options B, C, and D are closely related but offer a narrow or partial view of the bargaining environment. Option B refers only to the power dynamics between the parties, while option C focuses on their level of alternatives outside the negotiations. Option D emphasizes the potential impact of the contract terms on the broader environment but does not capture the full scope of the bargaining environment itself.