Answer :
The Standard library provides a portion of the system call interface for UNIX and Linux.
What is standard library function?
The Standard library functions is known to be a term that is often referred to as the C Library functions.
They are known to be a kind of an inbuilt functions in C programming. The prototype as well as the data definitions of the above functions are said to be found in their various header files
Therefore, based on the above, The Standard library provides a portion of the system call interface for UNIX and Linux.
Hence option A, C are correct.
Learn more about Standard library from
https://brainly.com/question/14970308
#SPJ1