Mia, the chief ethics and compliance officer for a global tech firm based in the United States, sends a company$-$wide email to announce the introduction of an ethics hotline for reporting ethical misconduct. The company extends its internal ethical controls through hotlines, self$-$auditing programs, and other mechanisms so misconduct can be detected internally rather than externally. The ethics policies described in this scenario are encouraged by the $\_\_\_\_\_\_\_.$

a$.$ Public Company Accounting Oversight Board $($PCAOB$)$

b$.$ Federal Trade Commission $($FTC$)$

c$.$ The Federal Sentencing Guidelines for Organizations $($FSGO$)$