Read the following context and choose the best option to answer the question.
Context: The telegraph operator explains that he 'll be glad to help her , then adds , " It 's just 99 cents a word . " Well , with only $ 1 left after paying for the bull , the brunette realizes that she 'll only be able to send her sister one word . After thinking for a few minutes , she nods , and says , " I want you to send her the word , ' comfortable . ' " The telegraph operator shakes his head .
Question: What happens after the girl sends the word comfortable to her sister ?
Options: 
A. The sister knows she 's OK .
B. The sister wonders who messaged her .
C. None of the above choices .
D. The sister knows she 's in trouble


A