Ramona manages a team of $10$ designers at Purple Inc. She encourages all her subordinates to directly approach her and speak with her at any time of the day regarding issues they may be facing at work. Given this information, it can be said that $\_\_\_\_\_.$

a$.$

the company encourages functional turnover

b$.$

the company follows an arbitration system

c$.$

the company practices an open$-$door policy

d$.$

Ramona acts as an ombudsman in the company