A variable that will be used to contain only whole numbers should be declared as a(n) ____ data type.

A function may return a pointer but the programmer must ensure that the pointer

a. still points to a valid object after the function ends b. has not been assigned an address c. was received as a parameter by the function d. has not previously been returned by another function e. None of these

If you want to learn more about a command, point to its button and wait for the ____ to appear.

A. KeyTip B. database C. ScreenTip D. Help icon