An open source gcc complier was used to compile a source code used for safety critical application. The hardware design met all the required safety metric for SPFM$,$ LPFM and PLPFM along with the overall FIT rate requirements. however the agencies did not authorize to certify the product what could be the reasons. Select the right answers. a$.$ Tool classification document missed to specify compilers. b$.$ Lack of process audits potentially lead to this miss. c$.$ In general opensource and uncertified tool should not be used in safety critical work d$.$ Compilers used for safety critical must be qualified