For these declarations, which choice shows four equivalent ways to assign the character “y” in the string to a char variable c?

char buff[50] = “strings as arrays of characters are fun!”
char *str = buff+11;
char c;

• A
  c = buff[16];
  c = str[5];
  c = *(buff+16);
  c = *(str+5);
• B
  c = *(buff[15]);
  c = *(str[4]);
  c = buff+15;
  c = str+4;
• C
  c = buff[15];
  c = str[4];
  c = *(buff+15);
  c = *(str+4);
• D
  c = *(buff[16]);
  c = *(str[5]);
  c = buff+16;
  c = str+5;