Which statement is false?
a. a. The compiler always creates a default constructor for a class.
b. b. If a class's constructors all require arguments and a program attempts to call a no-argument constructor to initialize an object of the class, a compilation error occurs.
c. c. A constructor can be called with no arguments only if the class does not have any constructors or if the class has a public no-argument constructor.
d. d. None of the above.