Which statements are true? Select 4 options. A class variable can be a different type of class.

A class variable can be a list of instances of a different class.

An instance of a class cannot be changed after it is created.

Functions defined in a class are called methods.

Variables defined in the constructor of a class can be accessed by the main program that uses instances of the class.

All of the answers are correct EXCEPT "An instance of a class cannot be changed after it is created.

Explanation: I've done the problem. Also, if you have an instance of a class, you can no longer change it. It is frozen in time as that one instance. If had a class defining pets and you made an instance dogA where the pet was a brown medium sized dog, dogA would always be a brown medium sized dog. I think, at least.

nope i prefer two because it is simpler, i don't like all the powers you get

explanation:

but that's my opinion

which functions return a valid value without any arguments?

(-blank- and -blank- return a valid value without any arguments.)

1st -blank-

today

sqrt

count

2nd -blank-

round

now

sqrt