程序題：我想啟動(dòng)一個(gè)線程執(zhí)行特定的任務(wù)，任務(wù)的具體執(zhí)行內(nèi)容定義在TheRunnable類中（實(shí)現(xiàn)了java.lang.Runnable接口）：
TheRunnable theRunnable = new TheRunnable();
以下哪個(gè)語(yǔ)句可用于啟動(dòng)theRunnable任務(wù)線程：_____
a) theRunnable.run();
b) theRunnable.start();
c) Thread thread = new Thread(theRunnable); thread.run();
d) Thread thread = new Thread(theRunnable); thread.start();