14. Which is valid C expression? A. int my_num= 100,000; B. int my_num= 100000; C. int my num= 1000; D. int $my_num= 10000; 15. What is the output of this C code? #include int main() { int ThisIsVariableName = 12; int ThisIsVariablename = 14; printf("%d", ThisIsVariablename); return 0; } A. The program will print 12 B. The program will print 14 C. The program will have a runtime error D. The program will cause a compile-time error due to re-declaration