运行以下Python代码，输出结果是？

xx425538 单选题共个子题

class Person():
    def __init__(self, name, age):
        self.name = name
        self.age = age
    def say_hello(self):
        print(f"Hello, my name is {self.name}. I am {self.age} years old.")

person1 = Person("Alice", 25)
person2 = Person("Bob", 30)
person1.say_hello()

Hello, my name is Alice. I am 25 years old.

Hello, my name is Bob. I am 30 years old.

Hello, my name is Bob. I am 25 years old.

Hello, my name is Alice. I am 30 years old.

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