What is the purpose of "rb" in fopen() function used below in the code

1.	What is the purpose of "rb" in fopen() function used below in the code?
A.	Open "demo.txt" in binary mode for reading
B.	Create a new file "demo.txt" for reading and writing
C.	Open "demo.txt" in binary mode for reading and writing
D.	None of the above
Answer» B. Create a new file "demo.txt" for reading and writing

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