The preprocessor directive always starts with the symbol A. % B. & C. # D. “” E. None of the above

The correct answer is C. #.

A preprocessor directive is a command that tells the preprocessor to do something before the compiler starts compiling the code. Preprocessor directives always start with the symbol #.

Option A, %, is the modulo operator. It is used to find the remainder of a division.

Option B, &, is the bitwise AND operator. It is used to combine two bits into one bit, with the result being 1 if both bits are 1, and 0 otherwise.

Option D, “”, is an empty string. It is a sequence of

Option E, None of the above, is also incorrect.