Final answer:
TSO/E and ISPF is the most commonly used interface for z/OS application programmers.
Therefore, the correct answer is: option B). TSO/E and ISPF
Step-by-step explanation:
z/OS is an operating system that runs IBM mainframe computers. Introduced in 2000, this operating system is still very much active and relevant to modern computing.
The most commonly used interface for z/OS application programmers is TSO/E and ISPF. TSO/E (Time Sharing Option/Extended) is the interactively accessed command environment for z/OS, and ISPF (Interactive System Productivity Facility) is a programming interface that offers a set of tools and utilities for developing, editing, and debugging mainframe applications.
In computing, Interactive System Productivity Facility (ISPF) is a software product for many historic IBM mainframe operating systems and currently the z/OS and z/VM operating systems that run on IBM mainframes.