?Windows users who want to allow multiple people use of their computer can add a(n) ____ for each user.

An example of a component would be:

a) a button b) a timer c) a form d) All of the above

What is displayed by the following code fragment if all the variables are of type int?

``` k = 0; m = 0; for (p = 0; p < 10; p = p + k) { k = k + 1; m = m + p; printf("%4d%4d%4d\n", p, k, m); } ```