Consider the following code.

char *findSubstring(char *str, char *needle) { int len = strlen(needle); int n = 0; while (*str) { printf("%c%c ",*str, *(needle+n)); if ( *(needle+n) == *str) { n++; if (n == len) return (str-len)+1; } else { str -= n; n = 0; } str++; } return NULL; }

What is the output of findSubstring("ACDCDEF","CDE")?

Group of answer choices

AC CC DC CC DC CC DC EC

AC CC DC CC DC CC DD EE

AC CC DD CE DE CE DE EE

AC CC DD CE DC CC DD EC

AC CC DD CE DC CC DD EE