Which of the following statements is true? i. ii. iii. A program counter points to the memory address of the instruction that the CPU is currently executing. An assembler "assembles" assembly language into register transfer language (RTL). Interrupt checking is typically carried out at various times during the execution of a machine instruction. A) All statements are true B) Only statement i is true C) Only statement ii is true D) Only statements i and iii are true E) All statements are false