The support agents of Cosmic Enterprises have been given access to a custom object called 'Repair Job' to allow them to view and update information used by the company's technicians for different types of repair jobs. Some fields on the object contain High Business Impact (HBI) data and should only be edited by support managers and users above them in the role hierarchy. What steps should be recommended for this requirement? Choose 2 answers

A、Edittheprofileofthesupportagentsandremove'Edit'accesstothefieldsusingfield-levelsecurity.
B、Edittheprofilesassignedtothesupportmanagersandtheusersabovethemintherolehierarchytogrant'Read'and'Edit'accesstothefieldsusingfield-levelsecurity.
C、Edittheprofilesassignedtothesupportmanagersandtheusersabovethemintherolehierarchytogrant'Read'and'Edit'accesstothefieldsontheassignedpagelayout.
D、Editthepagelayoutassignedtotheprofileofsupportagentsandmarkthefieldsas'ReadOnly'.