BC Telco Ltd$,$ plans to introduce an open$-$door policy to deal with employee concerns. This management approach can only be successful if $\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_$

Select one:

a$.$

Managers must ensure that employees only expresss job$-$related concerns.

b$.$

Managers must emphasize that they can offer solutions only as suggestions.

c$.$

Managers must encourage employees to voice their concerns and listen honestly to those concerns.

d$.$

Managers must formalize the procedure and require employees to "follow the chain of command."