Context: He started radiation on Monday of this week . They did n't have any visitors on Monday or Tuesday becasue we had all agreed that they needed time for him to get used to his radiation and for them to get used to the Ronald McDonald House . Well on Tuesday his mom was very sad and lonely so Derek and I jumped in the car and went to Nashville ( 2 hours away ) to take them to dinner . We had so much fun and Gunner had a great time .

Question: What 's a possible reason someone started radiation on Monday ?
Options:
0. None of the above choices .
1. Because they needed time for him to get used to his radiation .
2. Because they did n't have any visitors on Monday or Tuesday .
3. Because he needed to get used to the Ronald McDonald House .
Answer: 0