运行以下Python代码，结果是？（ ）
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 30 years old.
