The following C code results in an error.

#include <stdio.h>
#define world( n ) printf( "t^^" #n" = %c", t##n )
int t3=1;
int main()
{
   world(3);
}

A. Compile C code B. Optimize code C. Preprocess code before compilation D. Execute code

A. #define B. #include C. #ifdef D. #pragma

A. To include a header file B. To define a macro C. To declare a constant D. To declare a variable

A. #ifdef B. #ifndef C. #if D. #else