题目:下列代码的功能是产生4位随机数并保存,在“____”处应该填入( )。 Random rnd = new Random(); int randNum = rnd.nextInt(8999) + 1000; String randStr = String.valueOf(randNum); ____________
A. page.setAttribute("randStr",randStr);
B. request.setAttribute("randStr",randStr);
C. session.setAttribute("randStr",randStr);
D. application.setAttribute("randStr",randStr);
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