What is the key to successful usage of an app?

Reference-type variables (called references) store ________ in memory.

a. the value of an object b. a copy of an object c. the location of an object d. the size of an object

What will the following program output?

Given the class definition: class CreateDestroy { public: CreateDestroy() {<< "constructor called, ";} ~CreateDestroy() {<< "destructor called, ";} }; int main() { CreateDestroy c1; CreateDestroy c2; return 0; } a. constructor called, destructor called, constructor called, destructor called, b. constructor called, destructor called, c. constructor called, constructor called, d. constructor called, constructor called, destructor called, destructor called,