Which of the following is true of a whistle$-$blower hotline? Select one: a It is a secure telephone line through which a whistle $-$ blower can communicate with federal employees $.$ b $.$ It is a government $-$owned service that addresses the concerns a potential whistle $-$blower might have $.$ c$.$ It is a telephone line linked to various law enforcement agencies used by external whistle $-$blowers Od $.$ It is a telephone line that employees use to anonymously alert a company of suspected misconduct $.$