Answer:
Hi! I am sorry, but I'm afraid your question is incomplete. You don't mention the text you are talking about, neither do you present the options for the answer. Due to this, I can't give you the precise answer, I did a little research and I didn't find the information needed to complete it. I think you should have options, so I'll try to guide you in order to discover by yourself which option it is.
Step-by-step explanation:
When you finish the story, pay attention to the details given about Alexander and Mario's relationship with Mr. Kramer, and although you don't know exactly what the author would have done with their relationship, try to guess what you feel is going to happen. Ask yourself these questions: How do they get along? Do they care about each other? Do they have things in common? When you answer these questions in your head, you will be creating a possible future for this relationship, and you will be thinking what could their future be? Are they gonna be still together?
Now, read your options and pick the one that you find more reasonable based on what you read.
Trust yourself, you'll do great!
Hope this guide helps!