Final answer:
Without references to the specific scene from the Anne musical that mentions Grace's reasons for being delighted to eat at the automat, it's not possible to accurately answer why she felt that way.
Step-by-step explanation:
The context of Grace being delighted to eat at the automat in the Anne musical is not provided within the given reference texts. Therefore, without the specific information from the musical to answer why Grace is delighted, it is not possible to determine the correct choice between options A, B, C, and D.
To accurately answer the question regarding why Grace seems so delighted they chose to eat at the automat in the Anne musical, one would need direct reference to the scene or script from the musical itself which mentions her reasons or feelings about the automat.