C++ requires that a derived class constructor calls its base class constructor if the base class has no default constructor. This is because

Question 1 options:

	if there is no default constructor in the base class and the derived class does not call a base class constructor, a random base class constructor will be executed.
	if there is no default constructor in the base class and the derived class does not call a base class constructor, no base class constructor will be executed.
	if there is no default constructor in the base class and the derived class does not call a base class constructor, the compiler will not be able to create a default constructor for the base class.
	if there is no default constructor in the base class and the derived class does not call a base class constructor, the compiler will select the first defined base class constructor to execute which may not be what the programmer wants.