A _____ element is an element that contains one or more other elements, which are child elements.

Answer the following questions true (T) or false (F)

1. In a circular doubly linked list, inserting into the first position of the list is a special case. 2. Each node in a linear linked list references both its predecessor and its successor.

What is the program output if the user types runt followed by a carriage return when the program is run?

``` char r, x, y, z, w; scanf("%c%c%c%c", &x, &y, &z, &w); if (x < y) r = x; else r = y; if (r > z) r = z; if (r > w) r = w; printf("%c\n", r); ``` a. r b. u c. n d. t e. none of the above