已知字典dict1= {"name":"张三", "age":19, "sex":"男", "interest":"跑步"},那么执行dict1.setdefault("name","四")和dict1.update({"age":25})以后,dict1的值是()
A.
{"name":"张三", "age":19, "sex":"男", "interest":"跑步"}
B.
{"name":"四", "age":19, "sex":"男", "interest":"跑步"}
C.
{"name":"张三", "age":25, "sex":"男", "interest":"跑步"}
D.
{"name":"四", "age":25, "sex":"男", "interest":"跑步"}