Read the following context and choose the best option to answer the question.
Context: Babies think they 're invincible . They think they 're invulnerable to the rules of society . Today at Chipotle , I was eating a burrito by myself , and this little baby walked up to me , and stared at me . I chewed my burrito , pretending not to notice him , because he obviously must have been very embarrassed that he was gawking .
Question: Why does the narrator say " he obviously must have been very embarrassed that he was gawking " ?
Options: 
A. The narrator noticed the baby 's embarrassment .
B. The narrator was not being serious .
C. Babies think they 're invincible .
D. The narrator means it sincerely .


B