Which construct is used to run a group of steps as a subroutine?

• A. Repeat until loop
• B. Output command
• C. Call procedure
• D. Return statement

Answer: (C)

The idea being tested is how to run a set of steps as a reusable block, or subroutine, by invoking it with a call. When you define a group of steps as a procedure, you can trigger that whole block from another part of the program by making a call to that procedure. The call hands control to the subroutine, it executes its steps, and then control returns to where it left off to continue the rest of the program. This is how code is reused and kept organized.

The other options don’t fit this role. A repeat until loop is for performing the same steps multiple times, not for starting a predefined block. An output command just sends information to the screen, not for running a grouped set of steps. A return statement ends a subroutine and returns control (and possibly a value) to the caller; it’s used inside a subroutine to finish it, not to start it.