Which package is imported into every Java class by default?

A. java.util

B. java.lang

C. system.lang

D. java.system

Answer:

B. java.lang

Explanation:

The package java.lang is imported into every Java class, so Option B is correct. 

The other options must be explicitly imported. Option A exists but must be explicitly imported.

Options C and D do not exist in the standard Java runtime.