以下代码执行后的结果是:( ) public class Person { private String name; public Person(String name) { this.name = name; } public Person() { this.name = "小兰"; } public static void main(String[] args) { Person p = new Person("小凤"); System.out.print(p.name); p=new Person(); System.out.print(p.name); } } A. 小 B. 小 C. 小凤 D. 小兰