Eva just upgraded her software package.However,even though the updated version contains a number of more efficient methods for working with files,Eva continues to work with files the way she did before the upgrade.What is Eva showing evidence of in this case

A)  belief perseverance 
B)  priming 
C)  the availability heuristic 
D)  mental set

Mental Set

A psychological term for the framework or mindset with which an individual approaches problem-solving scenarios, which can often be influenced by past experiences and can either facilitate or inhibit the ability to solve new problems.

Software Package

A collection of computer programs, procedures, and related documentation that serve a specific function or set of functions.