Howshouldread writeandexecutepermissionsfor‘group’and‘other’begrantedtoallfilesanddirectorieswithinthe/appfilesystem?()

Howshouldread，writeandexecutepermissionsfor‘group’and‘other’begrantedtoallfilesanddirectorieswithinthe/appfilesystem？（）

A、chmod-R677/app

B、chmod-R664/app

C、chmod-r677/app

D、chmod-r664/app