Read the following context and choose the best option to answer the question.
Context: A scientist makes a robot , a love robot . He finds a unhappy girl , and has her fill out a questionaire of what her perfect boyfrind would be like . Then the robot is programmed with what she chooses . She is given the robot on a one week free trial basis .
Question: Why did the scientist give the girl a love robot free for a week ?
Options: 
- None of the above choices .
 - The scientist gave the girl a love robot free for a week because he is trying to advertise his robot .
 - The scientist gave the girl a love robot free for a week because he is using her as a tester .
 - The scientist gave the girl a love robot free for a week because he just feels like it


The scientist gave the girl a love robot free for a week because he is using her as a tester .