Which of the following statements are TRUE with respect to local variables within a function ?

Select one or more:

a.Local variables cease to exist when the function in which they are declared temporarily passes off the thread of control by calling another function.

b.Local variables are tightly associated with their function - they are used there and nowhere else.

c.Local variables are deallocated automatically when the function in which they are declared returns.

d.Languages almost always implement local variables using a stack structure in memory, hence giving them the name 'stack' variables.