Which of the following statements are correct?

Operational risk is firm$-$specific and not systemic.

The operational risks of one firm can affect other firms.

The operational loss of one firm can spread to other firms.

The operational loss of one firm cannot spread to other firms.

Choose the correct combination.

Select one:

a$.$

iii, iv

b$.$

ii$,$ iii

c$.$

i$,$ iv

d$.$

i$,$ ii