程序题：我想启动一个线程执行特定的任务，任务的具体执行内容定义在TheRunnable类中（实现了java.lang.Runnable接口）：
TheRunnable theRunnable = new TheRunnable();
以下哪个语句可用于启动theRunnable任务线程：_____
a) theRunnable.run();
b) theRunnable.start();
c) Thread thread = new Thread(theRunnable); thread.run();
d) Thread thread = new Thread(theRunnable); thread.start();