执行下列代码之后，输出的结果为______。public class ex39{ public static void main(String[] args) { int a=2; int b=3; int c=7; int d=a＞ca:c; d=d＞＞2＞bd:b; System.out.println(b); }}

A．2

B．3

C．7

D．5