Question: What will be the result of executing the following Java code if an object of a class implementing Runnable is passed to a Thread constructor and the start() method is called?

A) The run() method of the Runnable instance will be executed in a new thread, and the main thread will continue executing concurrently.
B) The run() method of the Runnable instance will be executed in the main thread.
C) The run() method of the Runnable instance will be executed only if the sleep() method is called within it.
D) The run() method of the Runnable instance will cause a compile-time error due to missing run() method implementation.