Which commands are included in the ARITH group for arithmetic?

• A. ADD, SUB, MUL, and DIV
• B. INCREMENT, DECREMENT, SET, and RESET
• C. INFIX, POSTFIX, PREFIX, and BINARY
• D. INC, DEC, SET, and CLEAR

Answer: (D)

Arithmetic in this context is about directly altering numeric data with simple, explicit commands rather than evaluating expressions. The ARITH group includes basic value-manipulation commands: INC increases the current value by one step, DEC decreases it by one step, SET assigns a specific value to a variable, and CLEAR resets the value (often to zero). These are the fundamental building blocks for adjusting counters, flags, or registers during a program.

Other options refer to different concepts. The first set are arithmetic operators used inside expressions rather than separate ARITH group commands. The second set uses full words and a RESET command instead of the standard ARITH commands, which are typically INC, DEC, SET, and CLEAR. The third set describes expression notations (infix, postfix, etc.), not ARITH group commands.