Read the following context and answer the question.
Context: She calls him down to dinner & to her shock , the minute he is done he marches back to his room without a word and in no time he is back hitting the books as hard as before . This goes on for some time , day after day while the Mother tries to understand what made all the difference . Finally , Little Johnny brings home his report card .
Question: What may be the reason Mother is baffled by Little Johnny 's behavior ?
Answer:


He rarely studied or did his homework so willingly before .