Consider the following execution in a processor with forwarding implemented, and with stall penalty of one clock cycle. Assume $[$$S$1]$ is not zero. Consider the following execution in a processor with forwarding implemented, and with stall

penalty of one clock cycle. Assume $[$ $$S1$ is not zero.

The total number of stalls for the sequence is

$2$

$3$

$1$

None of the above

Can it be explained why the correct answer is $1?$