Indicate if the following modifications $(A,B,C)$ will cause each of the three metrics $($three rightmost columns$)$ to increase, or have no effect. Explain your reasoning. Assume the initial machine is pipelined. Also assume that any modification is don that preserves correctness and maintains efficiency, but that the rest of the machine remains unchanged.

$\backslash$table$[[,$Instructions$/$Program$,\backslash$table$[[$CPI$],[($Cycles$/$Instruction$)]],\backslash$table$[[$Circuit$],[$complexity$]],],[$A

$\backslash$table$[[$Replace the $2$ operand ALU$],[$with a $3$ operand one and add $3],[$operand register$-$register$],[$instructions to the ISA $($for$],[$example$,],[$ADD rs$1,$ rs$2,$rs$3,$ Id $)]]\backslash$right$.,,,,],[$B$,\backslash$table$[[$Use the same ALU for$],[$instructions and for$],[$incrementing the PC by $4]],,,],[$C$,\backslash$table$[[$Increase the number of user$],[$registers from $32$ to $64]],,,]]$