If S is a stream open for reading, what do you expect from the following invocation?

If S is a stream open for reading, what do you expect from the following invocation?

A. one line of the file will be read and stored in the string called C B. the whole file content will be read and stored in the string called C C. one character will be read and stored in the string called C D. one disk sector (512 bytes) will be read and stored in the string called C