以下哪个选项是正确的json数据格式:
A.{ "id": 2, "userName": admin, "passWord": 12345, "email": admin@qq.com }
B.{ id: 2, userName: "admin", passWord: "12345", email: "admin@qq.com" }
C.{ "id": 2, "userName": "admin", "passWord": "12345", "email": "admin@qq.com", }
D.{ "id": 2, "userName": "admin", "passWord": "12345", "email": "admin@qq.com" }