In what way(s) do(es) non-execution based techniques such as cod

In what way(s) do(es) non-execution based techniques such as code walkthroughs and code inspections compensate for the time and effort involved?

A.earlier fault detection

B.rapid and thorough fault inspection

C.the presence of fewer faults at the integration phase

D.a reduction of up to 90% in corrective maintenance

E.all of these

正确答案是A