When countries adopt International Financial Reporting Standards $($IFRS$),$ which companies are required to use it$?$ O The countries always mandate use of IFRS to all the companies in the country. O The countries always leave the decision to use IFRS to the individual companies in the country. O Sometimes, the country mandates use of IFRS in full by all companies, sometimes only for publicly traded compar sometimes the decision is up to the individual company within that country. O The countries always mandate use of IFRS only for publicly traded companies in the country. Check