What does it mean that Java is a "safe" programming language?

The correct choice highlights that Java is designed to run within a secure environment, particularly in web browsers, using a feature known as the Java Virtual Machine (JVM). This environment is structured to prevent Java programs from accessing system resources in a way that could compromise the safety and security of the user's computer. Consequently, when Java programs are executed in a browser, they operate under strict security restrictions, which minimizes the risk of malicious attacks, such as deploying viruses or malware.

This safety mechanism ensures that users can run Java applets without fear of harming their systems, which is a key aspect of Java’s design philosophy aimed at maintaining user trust while running potentially unverified code over the internet. This characteristic is a significant reason why Java has been widely adopted for web development and other applications where security is paramount.