Given the pipelined CPU in the figure below, which code sequence(s) will fail to run correctly if the data-path A is cut?
add $s1, $t0, $t1 add $s3, $s2, $s1 add $s2, $s3, $s1
add $s3, $t0, $t1 add $s1, $s2, $s1 add $s2, $s3, $s1
add $s1, $t0, $t1 add $s1, $s2, $s1 add $s2, $s3, $s1
add $s1 $t0, $t1 add $s2, $s2, $s1 add $s2, $s3, $s1
