Given the question: Read the following article and select the best answer. Article: Hello! Nice to meet you. Now let me introduce myself to you. My name is Mary. I'm 12 years old. I'm from Canada and I speak English. I'm a tall girl. I have long brown hair and big blue eyes. I like _ a lot. I often sing songs with my friends in my free time. I have a happy family. There are four people in my family. They are my mom, my dad, my sister and me. I like China very much and I want to visit Beijing, but I can't speak Chinese at all. I hope to be your friend, then we can help each other with English and Chinese. ,. Question: How old is Mary? - Twelve. - Thirteen. - Fourteen. - Fifteen.
The answer is:
Twelve.