Given the definition of a class called Bag as following:

class Bag

$\{$

private:

int items$[100]$;

int itemCount;

public:

Bag$()$;

bool add$($int item$)$;

$\}$;

Which of following is correct?

Group of answer choices

Bag$()$ is the default constructor

Bag$()$ is a non$-$default constructor

Bag$()$ is not a constructor

There is only one member function in the class