What would be the results of executing the following code?

StringBuilder str $=$ new StringBuilder$(12)$;

str$.$append$("$The cow"$)$;

str$.$append$("$ jumped over the $")$;

str$.$append $("$moon$.")$;

str would reference "The cow jumped over the moon."

str would reference "The cow jump".

str would reference "The cow jumped over the $".$

The program would crash.