Which of the following statements concerning the disadvantages of a decentralized system are true? $($Choose every correct answer.$)$

Multiple select question.

Many companies have concluded that the advantages of decentralization are canceled by the inefficiencies and problems associated with it$.$

Managers and employees can more readily make decisions that undermine the interests of other areas of the company.

Top$-$level executives may experience difficulty monitoring the actions of personnel under their supervision.

Top$-$level managers frequently have too much control over mid$-$level managers.