Consider a hypothetical processor with an instruction of type LW R1, 20(R2), which during execution reads a 32-bit word from memory and stores it in a 32-bit register R1. The effective address of the memory location is obtained by the addition of a constant 20 and the contents of register R2. Which of the following best reflects the addressing mode implemented by this instruction for operand in memory?

• A. Immediate Addressing
• B. Register Addressing
• C. Register Indirect Scaled Addressing
• D. Base Indexed Addressing