Answer:
Because he could tell that he was upset, so he wanted to make it better. In this scene, Stein looked for Eliezer's father because he thought he remember him, but he didn't. He then asked about his wife and children, and Elie wanted to make him happy, so he lied. 
Explanation:
 
        
             
        
        
        
Alex filled the cupcake pans to the very top with batter. As a result, the batter spilled all over the sides as they baked. Even though the cupcakes were ugly, Alex knew they would taste delicious. So he grabbed a fork and took a giant bite. Oh no! He must have used salt instead of sugar, because the cupcakes tasted awful! Now, he would have to hurry to make new cupcakes before the bake sale started.
<u><em>There you go! Your welcome!</em></u>
 
        
             
        
        
        
The only word I'm seeing that could be an adjective is the word "old". 
(Correct me if I'm wrong, thanks!)
Have a great day!