What is POSIX?A$.$ These standards, formally known as Linux Standards, define the application and programs in Windows & MAC Systems for cross platform use.B$.$ These standards, formally known as Linux Standards, define the application and programs in WindowsC. These standards, formally known as IEEE $1003,$ define the application programming interfaces $($APIs$),$ shell, and utilities that are to be found on standard Unix$-$like systemD. These standards, formally known as IEEE $1003,$ are heavily used when creating code in Windows & MAC Systems