Which are some approaches to developing Ethical Corporate Behavior?

i$.$ Identifying practical issues

ii$.$ Analyzing existing practices

iii. Raising fundamental problems

iv$.$ Getting stakeholder support and approval

a$)$ i$,$ ii$,$ iv

b$)$ i$,$ iii, iv

$($c$)$ i$,$ ii$,$ iii

d$)$ ii$,$ iii, iv