Why do the dwarves blame Bilbo for upsetting the dragon?

Question 3 options:

Because Bilbo is too scared to go on and told the dragon their plan in hopes that he would free them.


He stole a gold cup so now Smaug is angry and knows there is a thief.


Because Bilbo got scared and told Smaug where the dwarves are hiding.


Because he tried to keep all the treasure for himself and now the dragon is mad.