程序題：我想啟動一個線程執行特定的任務，任務的具體執行內容定義在TheRunnable類中（實現了java.lang.Runnable接口）：
TheRunnable theRunnable = new TheRunnable();
以下哪個語句可用于啟動theRunnable任務線程：_____
a) theRunnable.run();
b) theRunnable.start();
c) Thread thread = new Thread(theRunnable); thread.run();
d) Thread thread = new Thread(theRunnable); thread.start();