About Question enthuware.ocpjp.v7.2.1382 :

[simsko]

What about the main thread? If 3 had been an option to answer, I would be confused.

[admin]

When you run a Java class, the JVM creates several threads on its own. The main thread is one of them. It is not created by the program code.
I have updated the problem statement to make it clear that it is asking about Thread objects created by the given program.
thank you for your feedback!
Paul.